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Safety Recommendation Details

Safety Recommendation A-78-021
Details
Synopsis: DURING ITS INVESTIGATION OF THE CRASH OF A UNITED AIRLINES CARGO LINER NEAR KAYSVILLE, UTAH, ON DECEMBER 18, 1977, THE NATIONAL TRANSPORTATION SAFETY BOARD FOUND THAT THE COCKPIT VOICE RECORDER (CVR) HAD BEEN INOPERATIVE DURING THE ENTIRE FLIGHT. AS A RESULT, VALUABLE ACCIDENT-RELATED INFORMATION WAS LOST. FURTHER INVESTIGATION REVEALED THAT THE CVR UNIT, A SUNDSTRAND DATA CONTROL,INC., MODEL V-557, HAD BEEN INOPERATIVE FOR SEVERAL DAYS BEFORE THE ACCIDENT. FLIGHTCREWS ARE REQUIRED TO PERFORM A PREFLIGHT FUNCTIONAL CHECK; HOWEVER, WE BELIEVE THAT CURRENT PREFLIGHT TESTING PROCEDURES DO NOT INSURE SATISFACTORY OPERATION OF THE CVR UNIT.
Recommendation: REVIEW THE ADEQUACY OF CURRENT COCKPIT VOICE RECORDER PREFLIGHT TESTING PROCEDURES TO ASSURE SATISFACTORY SYSTEM OPERATION.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: Kaysville, UT, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA78AA005
Accident Reports: United Airlines, Inc., Douglas DC-8-54, N8047U
Report #: AAR-78-08
Accident Date: 12/18/1977
Issue Date: 4/13/1978
Date Closed: 10/12/1978
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 8/3/1978
Response: Closed--acceptable action.

From: NTSB
To: FAA
Date: 7/27/1978
Response: Acknowledge receipt of faa ltr dated 6/9/78. Faa's actions taken in response to these recs. (a-78-21 and 22) have been evaluated as acceptable. A determination of final status will be made by the safety board & the faa will be notified of the closeout action.

From: FAA
To: NTSB
Date: 6/19/1978
Response: FAA LTR: THE FOLLOWING HAVE BEEN SENT TO NTSB: (1) FAA NOTICE N8320.222 DATED 1/11/78. (2) SUNSTRAND GENERAL INFORMATION LETTER NO. 586 DATED 1/27/78. (3) FAA GENOT OF 3/2/78 (4) SUNDSTRAND SERVICE BULLETIN. THESE COMMUNICATIONS INDICATE THE ACTIONS TO ASSURE ADEQUATE GROUND TESTING AND INFLIGHT OPERATION OF CVR'S.