AD Amdt-39-10126

final rule

Airworthiness Directives; Sikorsky Aircraft Corporation Model S- 61A, D, E, L, N, NM, R, and V Helicopters; Correction

AD Number
Amdt-39-10126
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. 97-SW-18-AD
FR Citation
63 FR 45170
Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system

Applicability

TypeManufacturerModelDetails
aircraft Sikorsky 61A Airworthiness Directives; Sikorsky Aircraft Corporation Model S- 61A, D, E, L, N, NM, R, and V Helicopters; Correction

Unsafe Condition

The anodizing process performed by Poly-Metal Company between October 1, 1996, and December 31, 1996, may have resulted in a degradation of the pocket assemblies on certain main rotor blades, leading to potential failure of the pocket assemblies.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Inspect main rotor blades to determine the anodizing date of pocket assemblies. Replace blades with anodized pocket assemblies from Poly-Metal Company between October 1, 1996, and December 31, 1996, with airworthy blades before further flight.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Before further flight

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

Sikorsky Aircraft Corporation Model S-61A, D, E, L, N, NM, R, and V helicopters with main rotor blades having pocket assemblies anodized by Poly-Metal Company between October 1, 1996, and December 31, 1996.

AI-generated summary from the source AD text. Verify against the official source before acting.

Federal Register Abstract

This document corrects the amendment number in airworthiness directive (AD) 97-19-06 that was incorrectly published in the Federal Register on September 19, 1997 (62 FR 49132). This AD is applicable to Sikorsky Aircraft Corporation Model S-61A, D, E, L, N, NM, R, and V helicopters and requires, before further flight, inspecting certain main rotor blades to determine the anodizing date for certain pocket assemblies installed on the blade, and if a blade has a pocket assembly that was anodized by Poly-Metal Company during the period of October 1, 1996, through December 31, 1996, replacing it with an airworthy blade.

Document Text

Show stored source text (verify against official source)
[Federal Register Volume 63, Number 164 (Tuesday, August 25, 1998)]
[Rules and Regulations]
[Page 45170]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 98-22699]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97-SW-18-AD; Amendment 39-10126; AD 97-19-06]
RIN 2120-AA64


Airworthiness Directives; Sikorsky Aircraft Corporation Model S-
61A, D, E, L, N, NM, R, and V Helicopters; Correction

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule; correction.

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SUMMARY: This document corrects the amendment number in airworthiness 
directive (AD) 97-19-06 that was incorrectly published in the Federal 
Register on September 19, 1997 (62 FR 49132). This AD is applicable to 
Sikorsky Aircraft Corporation Model S-61A, D, E, L, N, NM, R, and V 
helicopters and requires, before further flight, inspecting certain 
main rotor blades to determine the anodizing date for certain pocket 
assemblies installed on the blade, and if a blade has a pocket assembly 
that was anodized by Poly-Metal Company during the period of October 1, 
1996, through December 31, 1996, replacing it with an airworthy blade.

DATES: Effective October 6, 1997.
    The incorporation by reference of certain publications listed in 
the regulations was previously approved by the Director of the Federal 
Register as of October 6, 1997 (62 FR 49132, September 19, 1997).

FOR FURTHER INFORMATION CONTACT: Mr. Shep Blackman, Aerospace Engineer, 
FAA, Rotorcraft Directorate, Rotorcraft Standards Staff, 2601 Meacham 
Blvd., Fort Worth, Texas 76137, telephone (817) 222-5296, fax (817) 
222-5961.

SUPPLEMENTARY INFORMATION: Airworthiness Directive (AD) 97-19-06, 
amendment 39-10126, applicable to Sikorsky Aircraft Corporation Model 
S-61A, D, E, L, N, NM, R, and V helicopters was published in the 
Federal Register on September 19, 1997 (62 FR 49132). That AD requires, 
before further flight, inspecting certain main rotor blades to 
determine the anodizing date for certain pocket assemblies installed on 
the blade, and if a blade has a pocket assembly that was anodized by 
Poly-Metal Company during the period of October 1, 1996, through 
December 31, 1996, replacing it with an airworthy blade.
    As published, the amendment number given throughout the AD is 
incorrect.
    Since no other part of the regulatory information has been changed, 
the final rule is not being republished.
    The effective date of the AD remains October 6, 1997.
    In rule FR Doc. 97-24075 published on September 19, 1997 (62 FR 
49132), make the following corrections:


Sec. 39.13  [Corrected]

    (1) On page 49132, in the first column, correct ``Amendment 39-
10026'' to read ``Amendment 39-10126.''
    (2) On page 49133, in the first column, paragraph 2., correct the 
two recitations of ``Amendment 39-10026'' to read ``Amendment 39-
10126''.

    Issued in Fort Worth, Texas, on August 18, 1998.
Henry A. Armstrong,
Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 98-22699 Filed 8-24-98; 8:45 am]
BILLING CODE 4910-13-P

Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

Rights: U.S. Government Public Domain

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