AD 90-10-05

AD Final Rules - DRS_90-10-05.html
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AD Number:
90-10-05
Document Type:
AD Final Rules
Docket Number:
89-ASW-52
Subject Heading:
Airworthiness Directives; CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS; HAWKINS AND POWERS...Show more
Subject:
Tail Rotor Gearbox
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
06/05/1990
Make:
Bell Helicopter Textron, Inc. | California Department of Forestry | International Helicopters, Inc. ...Show more
Model:
TH-1L | UH-1E | UH-1L | UH-1F | UH-1B | UH-1A | UH-1H
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Superseded AD: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Superseded By: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: 90-10-05
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   89-ASW-52

AMENDMENT:   39-6596

AD NUMBER:   90-10-05

SUBJECT HEADING:   Airworthiness Directives; CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS; HAWKINS AND POWERS AVIATION, INC.; HERCULES; INTERNATIONAL HELICOPTERS, INC.; OFFSHORE CONSTRUCTION; OREGON HELICOPTERS; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; SOUTHWEST FLORIDA AVIATION; AND WEST COAST FABRICATIONS (these helicopters were manufactured by Bell Helicopter Textron, Inc under military contract) Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and TH-1L Helicopters

ACTION:  

SUMMARY:  

DATES:   Effective June 5, 1990.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
90-10-05 CALIFORNIA DEPARTMENT OF FORESTRY; GARLICK HELICOPTERS; HAWKINS AND POWERS AVIATION, INC.; HERCULES; INTERNATIONAL HELICOPTERS, INC.; OFFSHORE CONSTRUCTION; OREGON HELICOPTERS; PILOT PERSONNEL INTERNATIONAL, INC.; SMITH HELICOPTERS; SOUTHERN AERO CORPORATION; SOUTHWEST FLORIDA AVIATION; AND WEST COAST FABRICATIONS (these helicopters were manufactured by Bell Helicopter Textron, Inc under military contract): Amendment 39-6596. Docket No 89-ASW-52.

Applicability: Model UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and TH-1L helicopters, certificated in any category.

Compliance: Required as indicated, unless already accomplished.

To prevent failure of the tail rotor duplex bearing which could result in loss of tail rotor control and subsequent loss of the helicopter, accomplish the following:

(a) Within the next 100 hours' time in service after the effective date of this AD, determine if the tail rotor gearbox duplex bearing sets, P/N 204-040-424-001, having the following serial numbers are installed in the tail rotor gearbox output quill, P/N 204-040-012-009:

Serial Numbers


1 thru 182	MB183 thru MB382
MB442	MB486	MB513	MB518	MB519	MB524
MB530	MB531	MB544	MB545	MB548	MB549
MB551	MB553	MB554	MB561	MB659	MB743
MB744	MB760 thru MB769		MB927 thru MB936		
If a part with any of the listed serial numbers is installed, replace with a serviceable part before further flight.

(b) In accordance with FAR Sections 21.197 and 21.199, the helicopter may be flown to a base where the requirements of this AD may be accomplished.

(c) An alternate method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be used when approved by the Manager, Rotorcraft Certification Office, ASW-170, Rotorcraft Directorate, FAA, Southwest Region, Fort Worth, Texas.

This amendment (39-6596, AD 90-10-05) becomes effective on June 5, 1990.

FOOTER: