AD 89-08-06
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | AST, Inc | Bell Helicopter Textron, Inc. | California Department of Forestry | International Helicopters, Inc. | Overseas Aircraft Support Inc | Richards Heavylift Helo, Inc. | Rotorcraft Development Corporation | San Joaquin Helicopters | Smith Helicopters | Southern Helicopter, Inc. | Tamarack Helicopters, Inc. | US Helicopter, Inc. | West Coast Fabrications | UH-1F | Airworthiness Directives; CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS: HAWKINS AND POWERS AVIATION, INC.; HERCULES; INTERNATIONAL HELICOPTERS, INC.; OREGON HELICOPTERS; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; AND WEST COAST FABRICATIONS Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1L, and TH-1L Helicopters |
| aircraft | AST, Inc | Bell Helicopter Textron, Inc. | California Department of Forestry | International Helicopters, Inc. | Overseas Aircraft Support Inc | Richards Heavylift Helo, Inc. | Rotorcraft Development Corporation | San Joaquin Helicopters | Smith Helicopters | Southern Helicopter, Inc. | Tamarack Helicopters, Inc. | US Helicopter, Inc. | West Coast Fabrications | TH-1L | Airworthiness Directives; CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS: HAWKINS AND POWERS AVIATION, INC.; HERCULES; INTERNATIONAL HELICOPTERS, INC.; OREGON HELICOPTERS; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; AND WEST COAST FABRICATIONS Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1L, and TH-1L Helicopters |
| aircraft | AST, Inc | Bell Helicopter Textron, Inc. | California Department of Forestry | International Helicopters, Inc. | Overseas Aircraft Support Inc | Richards Heavylift Helo, Inc. | Rotorcraft Development Corporation | San Joaquin Helicopters | Smith Helicopters | Southern Helicopter, Inc. | Tamarack Helicopters, Inc. | US Helicopter, Inc. | West Coast Fabrications | UH-1E | Airworthiness Directives; CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS: HAWKINS AND POWERS AVIATION, INC.; HERCULES; INTERNATIONAL HELICOPTERS, INC.; OREGON HELICOPTERS; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; AND WEST COAST FABRICATIONS Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1L, and TH-1L Helicopters |
| aircraft | AST, Inc | Bell Helicopter Textron, Inc. | California Department of Forestry | International Helicopters, Inc. | Overseas Aircraft Support Inc | Richards Heavylift Helo, Inc. | Rotorcraft Development Corporation | San Joaquin Helicopters | Smith Helicopters | Southern Helicopter, Inc. | Tamarack Helicopters, Inc. | US Helicopter, Inc. | West Coast Fabrications | UH-1L | Airworthiness Directives; CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS: HAWKINS AND POWERS AVIATION, INC.; HERCULES; INTERNATIONAL HELICOPTERS, INC.; OREGON HELICOPTERS; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; AND WEST COAST FABRICATIONS Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1L, and TH-1L Helicopters |
| aircraft | AST, Inc | Bell Helicopter Textron, Inc. | California Department of Forestry | International Helicopters, Inc. | Overseas Aircraft Support Inc | Richards Heavylift Helo, Inc. | Rotorcraft Development Corporation | San Joaquin Helicopters | Smith Helicopters | Southern Helicopter, Inc. | Tamarack Helicopters, Inc. | US Helicopter, Inc. | West Coast Fabrications | UH-1B | Airworthiness Directives; CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS: HAWKINS AND POWERS AVIATION, INC.; HERCULES; INTERNATIONAL HELICOPTERS, INC.; OREGON HELICOPTERS; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; AND WEST COAST FABRICATIONS Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1L, and TH-1L Helicopters |
| aircraft | AST, Inc | Bell Helicopter Textron, Inc. | California Department of Forestry | International Helicopters, Inc. | Overseas Aircraft Support Inc | Richards Heavylift Helo, Inc. | Rotorcraft Development Corporation | San Joaquin Helicopters | Smith Helicopters | Southern Helicopter, Inc. | Tamarack Helicopters, Inc. | US Helicopter, Inc. | West Coast Fabrications | UH-1A | Airworthiness Directives; CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS: HAWKINS AND POWERS AVIATION, INC.; HERCULES; INTERNATIONAL HELICOPTERS, INC.; OREGON HELICOPTERS; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; AND WEST COAST FABRICATIONS Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1L, and TH-1L Helicopters |
Unsafe Condition
Failure of the main transmission spiral bevel gear, P/N 204-040-701-103, which could result in possible loss of the helicopter due to metal contamination, cracks, chipping, or metal deformation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 10 hours' time in service after the effective date, inspect the transmission internal sump oil filter for metal contamination and thereafter daily before flight. Inspect the spiral bevel gear for cracks, chipping, or deformation every 50 hours' time in service. Replace unserviceable parts before further flight. Exclude gears reaching or exceeding 250 hours' time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 10 hours' time in service after the effective date of this AD and, thereafter before the first flight of each day, and at intervals not to exceed 50 hours' time in service from the last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1L, and TH-1L helicopters with main transmission spiral bevel gear P/N 204-040-701-103 installed, having less than 250 hours' time in service after the effective date, and delivered as spares or in a new transmission between January 1, 1988, and April 4, 1989. Affected spare gears have serial numbers listed in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Transmission Internal Sump Oil Filter
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_89-08-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 89-08-06 Document Type: AD Final Rules Docket Number: 89-ASW-13 Subject Heading: Airworthiness Directives; CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS: HAWKINS AND POWER...Show more Subject: Transmission Internal Sump Oil Filter Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 02/07/1990 Make: AST, Inc | Bell Helicopter Textron, Inc. | California Department of Forestry | International Helicop...Show more Model: UH-1F | TH-1L | UH-1E | UH-1L | UH-1B | UH-1A Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 89-08-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 89-ASW-13 AMENDMENT: 39-6464 AD NUMBER: 89-08-06 SUBJECT HEADING: Airworthiness Directives; CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS: HAWKINS AND POWERS AVIATION, INC.; HERCULES; INTERNATIONAL HELICOPTERS, INC.; OREGON HELICOPTERS; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; AND WEST COAST FABRICATIONS Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1L, and TH-1L Helicopters ACTION: SUMMARY: DATES: Effective February 7, 1990. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 89-08-06 CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS: HAWKINS AND POWERS AVIATION, INC.; HERCULES; INTERNATIONAL HELICOPTERS, INC.; OREGON HELICOPTERS; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; AND WEST COAST FABRICATIONS (these helicopters were manufactured by Bell Helicopter Textron, Inc., under military contract): Amendment 39-6464. Docket No. 89-ASW-13. Final copy of Priority Letter AD. Applicability: Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1L, and TH-1L helicopters, certificated in any category, with main transmission spiral bevel gear, P/N 204-040-701-103 installed, having less than 250 hours' time in service after the effective date of this AD and delivered as spares or in a new transmission between January 1, 1988, and April 4, 1989. The spare (uninstalled) spiral bevel gears, P/N 204-040-701-103, affected serial numbers are as follows: A-3819 A-3821 A-3825 A-3826 A-3829 A-3833 A-3834 A-3836 A-3838 A-3840 A-3845 A-3847 A-3848 A-3850 A-3855 A-3856 A-3857 A-3858 A-3861 A-3878 A-3880 A-3885 A-3886 A-3889 A-3891 A-3892 A-3893 A-3895 A-3896 A-3897 A-3899 A-3901 A-3911 A-3915 A-3916 A-3919 A-3920 A-4008 A-4014 A-4017 A-4019 A-4020 A-4021 A-4027 A-4029 A-4068 A-4069 A-4071 A-4075 A-4077 A-4078 A-4079 A-4080 A-4081 A-4083 A-4084 A-4085 A-4087 A-4089 A-4090 A-4091 A-4092 A-4093 A-4094 A-4095 A-4096 A-4097 A-4098 A-4107 A-4108 A-4109 A-4147 A-4184 A-4186 A-4187 A-4188 A-4191 A-4192 A-4193 A-4213 A-4229 A-4233 A-4235 A-4236 A-4241 A-4243 A-4244 A-4245 A-4254 A-4266 A-4267 A-4274 A-4275 A-4280 A-4282 A-4288 A-4289 A-4290 A-4303 A-4319 A-4320 A-4325 A-4327 A-4328 A-4329 A-4332 A-4333 A-4334 A-4335 A-4336 A-4337 A-4358 A-4366 A-4368 A-4369 A-4370 A-4371 A-4372 A-4374 A-4376 A-4377 A-4378 A-4379 A-4380 A-4383 A-4385 A-4386 A-4387 A-4394 A-4395 A-4397 A-4400 A-4401 A-4403 A-4411 A-4417 A-4418 A-4428 Compliance: Required as indicated, unless already accomplished. To prevent failure of the main transmission spiral bevel gear which could result in possible loss of the helicopter, accomplish the following: (a) Within the next 10 hours' time in service after the effective date of this AD and, thereafter before the first flight of each day, accomplish the following: (1) Remove and inspect the transmission internal sump oil filter for evidence of metal contamination (e.g., steel particles in splinter, granular, or flake form). (2) If metal contamination is evident, disassemble the main transmission to determine the extent of damage and replace any unserviceable parts with serviceable parts before further flight. (b) Within the next 10 hours' time in service after the effective date of this AD and, thereafter, at intervals not to exceed 50 hours' time in service from the last inspection, accomplish the following: (1) Remove a quill pad cover, P/N 204-040-174-001, or rotor brake quill from the transmission main ring gear case to gain access to the main transmission spiral bevel gear. (2) Utilizing a bright light and a dental mirror, inspect all teeth in the spiral bevel gear, P/N 204-040-701-103, for evidence of cracks, chipping, and metal deformation. If cracks, chipping, or metal deformation is evident, the part must be removed from service and replaced with a serviceable part before further flight. (3) Reinstall pad cover, P/N 204-040-174-001, or rotor brake quill whichever is applicable. (c) The provisions of this AD do not apply when the time in service of the spiral bevel gear, P/N 204-040-701-103, reaches or exceeds 250 hours' time in service. NOTE: Spiral bevel gear, P/N 204-040-701-103, affected by this AD may be returned to Bell Helicopter Textron, Inc., Attn: CPR Monitor, 3000 South Norwood & Trinity Boulevard, Hurst, Texas 76053, for inspection and reidentification. After reidentification, the provisions of this AD no longer apply. (d) An alternate method of compliance or adjustment of the compliance time, which provides an equivalent level of safety, may be used when approved by the Manager, Rotorcraft Certification Office, Rotorcraft Directorate, Aircraft Certification Service, FAA, Southwest Region, Fort Worth, Texas. (e) In accordance with FAR Sections 21.197 and 21.199, flight is permitted to a base where the inspection requirements of this AD may be accomplished. This amendment (39-6464, AD 89-08-06) becomes effective on February 7, 1990, as to all persons except those persons to whom it was made immediately effective by Priority Letter AD 89-08-06, issued April 12, 1989, which contained this amendment. FOOTER:
Document Text
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AD Final Rules - DRS_89-08-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 89-08-06 Document Type: AD Final Rules Docket Number: 89-ASW-13 Subject Heading: Airworthiness Directives; CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS: HAWKINS AND POWER...Show more Subject: Transmission Internal Sump Oil Filter Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 02/07/1990 Make: AST, Inc | Bell Helicopter Textron, Inc. | California Department of Forestry | International Helicop...Show more Model: UH-1F | TH-1L | UH-1E | UH-1L | UH-1B | UH-1A Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 89-08-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 89-ASW-13 AMENDMENT: 39-6464 AD NUMBER: 89-08-06 SUBJECT HEADING: Airworthiness Directives; CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS: HAWKINS AND POWERS AVIATION, INC.; HERCULES; INTERNATIONAL HELICOPTERS, INC.; OREGON HELICOPTERS; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; AND WEST COAST FABRICATIONS Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1L, and TH-1L Helicopters ACTION: SUMMARY: DATES: Effective February 7, 1990. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 89-08-06 CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS: HAWKINS AND POWERS AVIATION, INC.; HERCULES; INTERNATIONAL HELICOPTERS, INC.; OREGON HELICOPTERS; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; AND WEST COAST FABRICATIONS (these helicopters were manufactured by Bell Helicopter Textron, Inc., under military contract): Amendment 39-6464. Docket No. 89-ASW-13. Final copy of Priority Letter AD. Applicability: Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1L, and TH-1L helicopters, certificated in any category, with main transmission spiral bevel gear, P/N 204-040-701-103 installed, having less than 250 hours' time in service after the effective date of this AD and delivered as spares or in a new transmission between January 1, 1988, and April 4, 1989. The spare (uninstalled) spiral bevel gears, P/N 204-040-701-103, affected serial numbers are as follows: A-3819 A-3821 A-3825 A-3826 A-3829 A-3833 A-3834 A-3836 A-3838 A-3840 A-3845 A-3847 A-3848 A-3850 A-3855 A-3856 A-3857 A-3858 A-3861 A-3878 A-3880 A-3885 A-3886 A-3889 A-3891 A-3892 A-3893 A-3895 A-3896 A-3897 A-3899 A-3901 A-3911 A-3915 A-3916 A-3919 A-3920 A-4008 A-4014 A-4017 A-4019 A-4020 A-4021 A-4027 A-4029 A-4068 A-4069 A-4071 A-4075 A-4077 A-4078 A-4079 A-4080 A-4081 A-4083 A-4084 A-4085 A-4087 A-4089 A-4090 A-4091 A-4092 A-4093 A-4094 A-4095 A-4096 A-4097 A-4098 A-4107 A-4108 A-4109 A-4147 A-4184 A-4186 A-4187 A-4188 A-4191 A-4192 A-4193 A-4213 A-4229 A-4233 A-4235 A-4236 A-4241 A-4243 A-4244 A-4245 A-4254 A-4266 A-4267 A-4274 A-4275 A-4280 A-4282 A-4288 A-4289 A-4290 A-4303 A-4319 A-4320 A-4325 A-4327 A-4328 A-4329 A-4332 A-4333 A-4334 A-4335 A-4336 A-4337 A-4358 A-4366 A-4368 A-4369 A-4370 A-4371 A-4372 A-4374 A-4376 A-4377 A-4378 A-4379 A-4380 A-4383 A-4385 A-4386 A-4387 A-4394 A-4395 A-4397 A-4400 A-4401 A-4403 A-4411 A-4417 A-4418 A-4428 Compliance: Required as indicated, unless already accomplished. To prevent failure of the main transmission spiral bevel gear which could result in possible loss of the helicopter, accomplish the following: (a) Within the next 10 hours' time in service after the effective date of this AD and, thereafter before the first flight of each day, accomplish the following: (1) Remove and inspect the transmission internal sump oil filter for evidence of metal contamination (e.g., steel particles in splinter, granular, or flake form). (2) If metal contamination is evident, disassemble the main transmission to determine the extent of damage and replace any unserviceable parts with serviceable parts before further flight. (b) Within the next 10 hours' time in service after the effective date of this AD and, thereafter, at intervals not to exceed 50 hours' time in service from the last inspection, accomplish the following: (1) Remove a quill pad cover, P/N 204-040-174-001, or rotor brake quill from the transmission main ring gear case to gain access to the main transmission spiral bevel gear. (2) Utilizing a bright light and a dental mirror, inspect all teeth in the spiral bevel gear, P/N 204-040-701-103, for evidence of cracks, chipping, and metal deformation. If cracks, chipping, or metal deformation is evident, the part must be removed from service and replaced with a serviceable part before further flight. (3) Reinstall pad cover, P/N 204-040-174-001, or rotor brake quill whichever is applicable. (c) The provisions of this AD do not apply when the time in service of the spiral bevel gear, P/N 204-040-701-103, reaches or exceeds 250 hours' time in service. NOTE: Spiral bevel gear, P/N 204-040-701-103, affected by this AD may be returned to Bell Helicopter Textron, Inc., Attn: CPR Monitor, 3000 South Norwood & Trinity Boulevard, Hurst, Texas 76053, for inspection and reidentification. After reidentification, the provisions of this AD no longer apply. (d) An alternate method of compliance or adjustment of the compliance time, which provides an equivalent level of safety, may be used when approved by the Manager, Rotorcraft Certification Office, Rotorcraft Directorate, Aircraft Certification Service, FAA, Southwest Region, Fort Worth, Texas. (e) In accordance with FAR Sections 21.197 and 21.199, flight is permitted to a base where the inspection requirements of this AD may be accomplished. This amendment (39-6464, AD 89-08-06) becomes effective on February 7, 1990, as to all persons except those persons to whom it was made immediately effective by Priority Letter AD 89-08-06, issued April 12, 1989, which contained this amendment. FOOTER:
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