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Safety Recommendation Details

Safety Recommendation A-76-080
Details
Synopsis: ON NOVEMBER 12, 1975, AN EASTERN AIR LINES BOEING 727 CRASHED SHORT OF THE RUNWAY AT RALEIGH-DURHAM AIRPORT, RALEIGH, NORTH CAROLINA. THE NATIONAL TRANSPORTATION SAFETY BOARD'S INVESTIGATION OF THAT ACCIDENT HAS DISCLOSED THAT THE RESTRAINT SYSTEM OF THE FORWARD FLIGHT ATTENDANT'S JUMPSEAT, AS INSTALLED, CAN CONTRIBUTE TO UNNECESSARY INJURIES TO FLIGHT ATTENDANTS DURING IN-FLIGHT TURBULENCE OR DURING CRASH LANDINGS.
Recommendation: ISSUE AN AIRWORTHINESS DIRECTIVE TO REQUIRE THAT THE SEATBELT TIEDOWN RINGS ON ALL BOEING 727 FORWARD JUMPSEATS BE RELOCATED SO THAT THE SEATBELT WILL BE POSITIONED ACROSS THE OCCUPANT'S PELVIC GIRDLE AT THE RECOMMENDED ANGLE WITH THE SEATPAN OF 45 DEGREE TO 55 DEGREE
Original recommendation transmittal letter: PDF
Overall Status: Closed - Unacceptable Action
Mode: Aviation
Location: Raleigh, NC, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA76AZ011
Accident Reports: Eastern Air Lines, Inc., Boeing 727-225, N8838E (Revised)
Report #: AAR-76-15
Accident Date: 11/12/1975
Issue Date: 5/19/1976
Date Closed: 12/30/1981
Addressee(s) and Addressee Status: FAA (Closed - Unacceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 12/30/1981
Response: We have considered the many reasons given by the faa for not adopting this recommendation and we cannot concur with the decision reached. The association of flight attendants and the transport workers union of america, who have their strong support to this recommendation for the protection of the public, will likewise be disappointed. We note that the faa is presently initiating a revision to tso-c39a, aircraft seats and berths, to include specific dimensional and energy absorption requirements for flight attendant seats andis revising tso-c22 to include requirements for shoulder harness installations. We hope that such details as properly configured occupant restraint systems will be considered. In view of the faa's determination not to adopt this recommendation, we are classifying it closed-- unacceptable action.

From: FAA
To: NTSB
Date: 5/11/1981
Response: FAA LTR: THE FOLLOWING REASON GIVEN FOR NON-ADOPTION: 1) DURING THE TYPE CERTIFICATION, THE B-727 FLIGHT ATTENDANT SEATBELT ANGLE WAS EVALUATED AND NOT FOUND TO BE DETRIMENTAL; 2) SPECIFICATION OF THE ANGLE HAS LITTLE MEANING ALONE, WITHOUT CONSIDERING THE POINT OF ATTACHMENT; 3) THERE HAVE BEEN NO MEDICAL TEST DATA TO SUBSTANTIATE THE DETRIMENTAL EFFECTS OF THE B-727 FLIGHT ATTENDANT BELTS. THERE HAS BEEN NO ADVERSE SERVICE EXPERIENCE AND THE BOARD HAS NOT PROVIDED ANY DATA; 4) "PROMETHEUS" (BOEING DOCUMENT D6-44779TN-0) FINDS ANGLES, OTHER THAN THE RANGE RECOMMENDED BY THE BOARD, NO INHERENTLY UNSAFE; 5) RETROFIT OF EXISTING FLIGHT ATTENDANT SEATS WOULD BE EXTREMELY COSTLY; 6) FAA IS PRESENTLY INITIATING A REVISION TO TSO-C39A, AIRCRAFT SEATS AND BERTHS, TO INCLUDE A SPECIFIC DIMENSIONAL AND ENERGY ABSORPTION REQUIREMENTS FOR SHOULDER HARNESS INSTALLATIONS. THE DIRECT RESULT OF THESE AND OTHER PROGRAMS WILL BE A GENERAL UPGRADING OF FLIGHT ATTENDANT AND PASSENGER SEAT INSTALLATIONS.

From: NTSB
To: FAA
Date: 9/22/1980
Response: The safety board is impressed with the initiative and the extensive voluntary efforts of industry in investigating a safety problem identified by the board after this problem had been summarily rejected by the faa. The safety board believes that the faa should investigate furtherthe nature of occupant/seat/restraint system interaction with a view towards establishing more definitive design, installation and test criteria guidelines. In view of the results of the above-mentioned boeing study, safety recommendations a-76-80 and 81 well have unduly restrictive in citing the then commonly accepted seatbelt angle guidelines of 45 to 55 degrees. How-ever, the board believes that the intent of these recommendations still is valid. Therefore, as alternate acceptable action, the faa should complete the following items to fulfill the intent of safety recommendations a-76-80 and 81. . . . the safety board awaits your response at which time a decision can be made whether the board should revise the status of safety recommenda- tions a-76-80 and 81.

From: FAA
To: NTSB
Date: 9/8/1976
Response: FAA LTR: FAA INVESTIGATION REVEALED THERE WAS NO RECORD OF MEDICAL TEST DATA WHICH SUBSTANTIATES THAT DETRIMENTAL EFFECTS WOULD BE SUSTAINED BY OCCUPANTS USING SEATBELTS AT ANGLES REPRESENTATIVE OF THE B-727. THE FAA IS NOT AWARE OF ANY ACCIDENT INJURIES THAT CAN BE ATTRIBUTED TO THE USE OF SEATBELTS OF WHICH THE ANGLE WITH THE SEAT PAN IS OUTSIDE THE RANGE RECOMMENDED BY THE NTSB, AND WE HAVE NO RECORD OF ADVERSE SERVICE EXPERIENCE. BASED ON THE RESULTS OF THESE INVESTIGATIONS, WE CONCLUDE THAT A CRITICAL UNSAFE CONDITION DOES NOT EXIST, AND ISSUANCE OF AN AD IS NOT WARRANTED.