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Safety Recommendation Details

Safety Recommendation A-70-056
Details
Synopsis: THE INVESTIGATION OF AIRCRAFT ACCIDENTS INVOLVING GENERAL AVIATION AND CORPORATE AIRCRAFT HAS BEEN DIFFICULT IN MANY CASES, BECAUSE IT IS VIRTUALLY IMPOSSIBLE TO TRACK DOWN THE EXISTING DOCUMENTATION TO VERIFY THE AVIONICS INSTALLATION IN THE SPECIFIC AIRCRAFT. QUITE OFTEN THE DOCUMENTATION RECOVERED DOES NOT ACCURATELY REFLECT THE AVIONICS SYSTEM INSTALLED IN THE SPECIFIC AIRCRAFT. A CASE IN POINT IS THE PITTSTON COMPANY'S JET COMMANDER AIRCRAFT WHICH CRASHED OCTOBER 31, 1969. THE WIRING DIAGRAMS PROVIDED TO THE PITTSTON COMPANY FOR THE AVIONICS SYSTEM INSTALLED IN THEIR AIRCRAFT WERE INACCURATE, AND A CORRELATION OF THE AIRCRAFT MAINTENANCE MANUAL AND STC WIRING DIAGRAMS WAS IMPOSSIBLE.
Recommendation: THE ADMINISTRATOR TAKE NECESSARY ACTION TO REQUIRE THE ISSUANCE OF SUPPLEMENTS TO THE SPECIFIC AIRCRAFT FLIGHT AND MAINTENANCE MANUALS WHENEVER THE AIRCRAFT OR AIRCRAFT SYSTEMS ARE MODIFIED. THESE SUPPLEMENTS SHOULD ACCURATELY REFLECT THE AVIONICS SYSTEM INSTALLATION IN THE SPECIFIC AIRCRAFT AND THE PROPER OPERATION OF THE SYSTEM.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: Rural Retreat, VA, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: IAD70A0028
Accident Reports: The Pittston Company Aero Commander 1121, N236JP
Report #: AAR-70-22
Accident Date: 10/31/1969
Issue Date: 10/30/1970
Date Closed: 2/20/1975
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: FAA
To: NTSB
Date: 11/19/1970
Response: 11/19/70 THE FAA POINTED OUT THAT THEIR AIRWORTHINESS RULES ALREADY PRESCRIBE BOTH A FLIGHT MANUAL AND A MAINTENANCE MANUAL; THAT THEIR AIRPLANE MAINTENANCE MANUAL RULE STATES THAT THE MAINTENANCE MANUAL MUST CONTAIN, AMONG OTHER THINGS, A DESCRIPTION OF VARIOUS SYSTEMS, INCLUDING THE ELECTRICAL SYSTEM; AND THAT, SINCE APPLICANTS FOR SUPPLEMENTAL TYPE CERTIFICATES COVERING AIRCRAFT MODIFICATIONS ARE ALSO SUBJECT TO THOSE AIRWORTHINESS RULES, THE FLIGHT AND MAINTENANCE MANUALS MUST BE REVISED TO BE CONSISTENT WITH THE MODIFIED AIRCRAFT. THE FAA FURTHER STATED THAT IF THE BOARD CONSIDERED THAT THE RULES DEALING WITH FLIGHT AND MAINTENANCE MANUALS DID NOT GO FAR ENOUGH THEY WOULD BE GLAD TO REVIEW THE SUBJECT WITH THE BOARD'S TECHNICAL STAFF.