AD 87-06-02

AD Final Rules - DRS_87-06-02.html
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AD Number:
87-06-02
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; HONEYWELL, INC., SPERRY COMMERCIAL FLIGHT SYSTEMS DIVISION (SPERRY CORPO...Show more
Subject:
Electronic Flight Instrument Systems Symbol Generators
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
05/11/1987
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Superseded AD: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Superseded By: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: 87-06-02
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-5610

AD NUMBER:   87-06-02

SUBJECT HEADING:   Airworthiness Directives; HONEYWELL, INC., SPERRY COMMERCIAL FLIGHT SYSTEMS DIVISION (SPERRY
CORPORATION, AEROSPACE AND MARINE GROUP): Applicable to Sperry Electronics Flight Instrument Systems (EFIS) Symbol Generators

ACTION:  

SUMMARY:  

DATES:   Effective May 11, 1987.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
87-06-02 HONEYWELL, INC., SPERRY COMMERCIAL FLIGHT SYSTEMS DIVISION (SPERRY CORPORATION, AEROSPACE AND MARINE GROUP): Amendment 39-5610. Applicable to the following models of Sperry Electronics Flight Instrument Systems (EFIS) Symbol Generators, which have not been modified to Mod Level S or subsequent:

MODEL	SPERRY PART NUMBER
SG-810	7004544-901
SG-811	7004544-811
SG-610	7004544-902

NOTE: These systems are 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.

Compliance is required as indicated, unless previously accomplished.

To reduce the possibility of AHRS attitude and heading computations being contaminated, which can result in frozen attitude and heading displays on both instrument panels, accomplish the following:

A. Prior to further flight, install a placard adjacent to the first pilot's electronic attitude direction indicator (EADI), in full view of the pilot, stating "FLIGHT INTO KNOWN IMC PROHIBITED."

B. Modification of the Sperry EFIS Symbol Generator models listed above to Mod Level S or subsequent, or installation of the following Sperry EFIS Symbol Generator models, constitutes terminating action of the operational and placard requirements of paragraph A., above:

MODEL	SPERRY PART NUMBERS	MOD LEVEL (OR SUBSEQUENT)
SG-811	7004544-211	
V

SG-811	7004544-311	
AD

SG-811	7004544-411	
U

SG-611	7004544-611	
S

All persons affected by this directive who have not already received the appropriate service documents from the manufacturer, may obtain copies upon request to Honeywell Inc., Sperry Commercial Flight Systems Division (formerly Sperry Corporation, Aerospace and 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 May 11, 1987, as to all persons, except those persons to whom it was made immediately effective by Priority Letter AD 87-06-02, issued March 13, 1987.

FOOTER: