Skip Ribbon Commands
Skip to main content
Safety Recommendation Details

Safety Recommendation A-81-110
Details
Synopsis: ON JUNE 19, 1980, A MCDONNELL DOUGLAS DC-9-80, N1002G, SKIDDED OFF THE RIGHT SIDE OF RUNWAY 21R WHILE ATTEMPTING A SIMULATED HYDRAULIC SYSTEMS INOPERATIVE LANDING AT THE YUMA INTERNATIONAL AIRPORT, YUMA, ARIZONA. THE AIRCRAFT CAME TO REST ABOUT 6,700 FEET BEYOND THE LANDING THRESHOLD OF THE RUNWAY. THE AIRCRAFT WAS DAMAGED SUBSTANTIALLY; HOWEVER, THE THREE FLIGHTCREW MEMBERS WERE NOT INJURED. THERE WERE NO PASSENGERS. THE PURPOSE OF THE FLIGHT WAS TO DEMONSTRATE THAT THE AIRCRAFT COULD BE FLOWN AND LANDED SAFELY WITH A COMPLETE FAILURE OF ITS HYDRAULIC SYSTEMS TO DEMONSTRATE COMPLIANCE WITH A SPECIAL CONDITION TO THE PROVISIONS OF 14 CFR 25. (FOR MORE INFORMATION READ NTSB-AAR-81-16.)
Recommendation: THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: CONDUCT AN ENGINEERING EVALUATION OF THE DC-9 SERIES -10 THROUGH -50 BRAKE HYDRAULIC ACCUMULATORS AND ANTISKID SYSTEMS TO DETERMINE IF THE BRAKE ANTISKID SYSTEMS CAN BE LEFT ON DURING HYDRAULICS-OUT LANDINGS. REVISE WHERE APPLICABLE THE HYDRAULICS-OUT LANDING PROCEDURES FOR THE DC-9 SERIES -10 THROUGH -50 AIRPLANES TO CORRESPOND WITH THOSE DEVELOPED FOR THE DC-9-80 WITHIN THE CAPABILITIES OF THE RESPECTIVE BRAKE HYDRAULIC ACCUMULATORS AND ANTISKID SYSTEMS.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: Yuma, AZ, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: LAX80FA111
Accident Reports: McDonnell Douglas Corporation, DC-9-80, N1002G
Report #: AAR-81-16
Accident Date: 6/19/1980
Issue Date: 9/15/1981
Date Closed: 5/12/1983
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 5/12/1983
Response: The completion of the engineering evaluation of the DC-9 series -10 through -50 brake hydraulic accumulators and antiskid systems by the Douglas Aircraft Company fulfills the intent of the recommendation. Since these evaluations have established that insufficient brake accumulator capacity exists on the DC-9 series -10 through - 50 airplanes to permit the use of antiskid during a hydraulics-out landing, the Safety Board considers this recommendation "Closed--Acceptable Action."

From: FAA
To: NTSB
Date: 7/12/1982
Response: FAA LETTER: THE DOUGLAS AIRCRAFT COMPANY HAS COMPLETED AN ENGINEERING EVALUATION OF THIS RECOMMENDATION. THE FAA CONC IN THE RESULTS WHICH INDICATE THAT THE HYDRAULICS-OUT LANDIN PROCEDURES FOR THE DC-9 SERIES -10 THROUGH -50 AIRPLANE SHOULD NOT BE REVISED OR MODIFIED TO PROVIDE ANTISKID OPERATION SIM TO THE DC-9-80 PROCEDURES OR THE HYDRAULICS-OUT LANDING. THE ANALYSIS INDICATES THAT ANTISKID OPERATION MAY DEPLETE THE B HYDRAULIC ACCUMULATORS PRIOR TO SAFETY STOPPING THE AIRPLANE THEREFORE, THE EXITING PROCEDURE OF USING MANUAL BRAKING WITH ANTISKID PROTECTION IS CONSIDERED BY THE FAA TO BE THE SAFEST PROCEDURE FOR THE DC-9 SERIES -10 THROUGH -50 AIRPLANES.

From: NTSB
To: FAA
Date: 7/8/1982
Response: Your reply indicated that an in-depth evaluation of these recommendations would be conducted at meetings between FAA and aircraft manufacturer representatives; therefore, these recommendations have been classified as "Open--Acceptable Action," pending receipt of your findings.

From: FAA
To: NTSB
Date: 12/30/1981
Response: FAA LTR: THE FAA CONCURS IN THE INTENT OF THIS RECOMMENDATION AND AGREES THAT FURTHER STUDY AS RECOMMENDED IN A-81-104, 107, 110, AND 112 IS DESIRABLE. HOWEVER, A MEANINGFUL RESPONSE TO THESE RECOMMENDATIONS AT THIS TIME WOULD BE PREMATURE. MEETINGS ARE SCHEDULED IN THE NEAR FUTURE BETWEEN FAA AND MCDONNELL DOUGLAS REPRESENTATIVES TO CONDUCT AN IN-DEPTH EVALUATION OF EACH RECOMMENDATION. ESTIMATED COMPLETION DATE OF THESE DISCUSSIONS IS EARLY JANUARY 1982. AT THE CONCLUSION OF THESE EVALUATIONS, THE BOARD WILL BE INFORMED OF OUR FINDINGS.