Skip Ribbon Commands
Skip to main content
Safety Recommendation Details

Safety Recommendation A-72-152
Details
Synopsis: FLIGHT 366, A BOEING 720B, ON A PROFICIENCY CHECK FLIGHT, YAWED AND ROLLED OUT OF CONTROL, AND CRASHED WHILE IN THE PROCESS OF EXECUTINGA 3-ENGINE MISSED-APPROACH FROM A SIMULATED ENGINE-OUT ILS INSTRUMENT APPROACH. THE FIVE CREW-MEMBERS AND ONLY OCCUPANTS DIED IN THE CRASH. THE WEATHER CONDITIONS AT ONTARIO WERE 600 FEET OVERCAST, WITH 3/4-MILE VISIBILITY IN FOG, HAZE, AND SMOKE. THE NATIONAL TRANSPORTATION SAFETY BOARD DETERMINES THAT THE PROBABLE CAUSE OF THIS ACCIDENT WAS THE FAILURE OF THE AIRCRAFT RUDDER HYDRAULIC ACTUATOR SUPPORT FITTING. THE FAILURE OF THE FITTING RESULTED IN THE INAPPARENT LOSS OF LEFT RUDDER CONTROL WHICH, UNDER THE CONDITIONS OF THIS FLIGHT, PRECLUDED THE PILOT'S ABILITY TO MAINTAIN DIRECTIONAL CONTROL DURING A SIMULATED ENGINE-OUT MISSED- APPROACH. THE EXISTING WEATHER CONDITIONS DEGRADED EXTERNAL VISUAL CUES, THEREBY HAMPERING RAPID ASSESSMENT OF AIRCRAFT PERFORMANCE BY THE FLIGHT CHECK CAPTAIN.
Recommendation: 14 CFR 61, APPENDIX A, AND 14 CFR 121, APPENDICES E AND F BE AMENDEDTO INCLUDE A REQUIREMENT FOR PILOTS TO DEMONSTRATE THEIR ABILITY TO RECOVER FROM ABNORMAL REGIMES OF FLIGHT AND UNUSUAL ATTITUDES SOLELY BY REFERENCE TO FLIGHT INSTRUMENTS. FOR MAXIMUM SAFETY, THESE DEMONSTRATIONS SHOULD BE CONDUCTED IN AN APPROPRIATE FLIGHT SIMULATOR. SHOULD EXISTING OR PROPOSED SIMULATORS BE INCAPABLE OF REALISTICALLY DUPLICATING AIRCRAFT PERFORMANCE IN THE REGIMES OF FLIGHT BEYOND NORMAL OPERATION, IT IS FURTHER RECOMMENDED THAT THE FAA TAKE APPROPRIATE MEASURES TO REQUIRE THAT SUCH EXISTING OR PROPOSED SIMULATORS BE REPLACED OR MODIFIED TO INCLUDE SUCH A CAPABILITY.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Unacceptable Action
Mode: Aviation
Location: Ontario, Canada
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA71AZ009
Accident Reports: Western Air Lines, Inc., Boeing 720- 047B, N3166
Report #: AAR-72-18
Accident Date: 3/31/1971
Issue Date: 6/7/1972
Date Closed: 1/16/1973
Addressee(s) and Addressee Status: FAA (Closed - Unacceptable Action)
Keyword(s):

Safety Recommendation History
From: FAA
To: NTSB
Date: 9/26/1972
Response: THE SIMULATOR IS NOT CAPABLE OF SIMULATING CERTAIN REGIMES OF FLIGHT WHICH GO BEYOND THE NORMAL FLIGHT ENVELOPE OF THE AIRCRAFT. FURTHER, SINCE AN AIRCRAFT SIMULATOR IS NOT REQUIRED AS PART OF AN AIR CARRIER TRAINING PROGRAM, THE FAA CANNOT REQUIRE THAT IT BE REPLACED OR MODIFIED TO SIMULATE REGIMES OF FLIGHT OUTSIDE THE FLIGHT ENVELOPE OF THE AIRCRAFT.