AD 86-14-01

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AD Number:
86-14-01
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; SPERRY CORPORATION, AEROSPACE AND MARINE GROUP: Applies to Sperry Corpor...Show more
Subject:
Attitude Heading Reference System
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
07/14/1986
Make:
ATR - GIE Avions de Transport R gional | Bombardier Inc. | Cessna Aircraft Company | Textron Aviatio...Show more
Model:
ATR42-200 | ATR42-300 | ATR42-320 | ATR42-500 | DHC-8-101 | DHC-8-102 | DHC-8-103 | DHC-8-106 | DHC-...Show more
Product Type:
Appliance
Product Subtype:
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 86-14-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5340

AD NUMBER:   86-14-01

SUBJECT HEADING:   Airworthiness Directives; SPERRY CORPORATION, AEROSPACE AND MARINE GROUP: Applies to Sperry Corporation AHZ-600 Attitude Heading Reference System (AHRS)

ACTION:  

SUMMARY:  

DATES:   Effective July 14, 1986.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
86-14-01 SPERRY CORPORATION, AEROSPACE AND MARINE GROUP: Amendment 39-5340. Applies to Sperry Corporation AHZ-600 Attitude Heading Reference System (AHRS), known to be installed in, but not limited to, DeHavilland Model DHC-8, British Aerospace Model BAe 125-800, Cessna Model 650, and Aerospatiale Model ATR-42 series airplanes, certificated in any category. Compliance is required within 30 days after the effective date of this AD, unless previously accomplished.

To prevent loss of attitude/heading reference information, accomplish the following:

A. Modify the Sperry Corporation AH-600 Strapdown Attitude and Heading Reference Unit (AHRU) by incorporating modifications in accordance with the following Sperry Service Bulletins or later revisions approved by the Manager, Western Aircraft Certification Office, FAA, Northwest Mountain Region:

21-1985-175, dated April 7, 1986 (Modification T);

21-1985-186, dated April 7, 1986 (Modifications S & V);

21-1985-187, dated April 7, 1986 (Modification U);

21-1986-19, dated April 22, 1986 (Modification Z);

21-1986-20, dated April 22, 1986 (Modification AA); and

21-1986-29, dated April 22, 1986 (Modification AB).

B. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, Western Aircraft Certification Office, FAA, Northwest Mountain Region.

C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Sperry Corporation, Aerospace & Marine Group, P.O. Box 29000, Phoenix, Arizona 85038-9000. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or the Western Aircraft Certification Office, 15000 Aviation Boulevard, Hawthorne, California.

This amendment becomes effective July 14, 1986.

FOOTER: