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Safety Recommendation Details

Safety Recommendation A-73-009
Details
Synopsis: AT APPROXIMATELY 1110 EASTERN DAYLIGHT TIME ON AUGUST 14, 1972, A TURBO COMMANDER 690, N1NR, OWNED AND OPERATED BY NORTH AMERICAN ROCKWELL, INC., CRASHED IN THE VICINITY OF WELLSBURG, WEST VIRGINIA.THE TWO CREWMEMBERS AND THE SOLE PASSENGER WERE FATALLY INJURED. N1NR DEPARTED THE GREATER PITTSBURGH INTERNATIONAL AIRPORT, PITTSBURGH, PENNSYLVANIA, AT 1101 EASTERN DAYLIGHT TIME, ON A COMPANY-SCHEDULED TRAINING FLIGHT. THE FLIGHT REQUESTED AND REPORTED REACHING 12,500 FEET. AT APPROXIMATELY 1110 EASTERN DAYLIGHT TIME, GREATER PITTSBURGH DEPARTURE CONTROL REQUESTED LOSS OF RADAR AND RADIO CONTACT WITH THE AIRCRAFT. THE NATIONAL TRANSPORTATION SAFETY BOARD DETERMINES THAT THE PROBABLE CAUSE OF THIS ACCIDENT WAS THE LOSS OF AIRCRAFT CONTROL IN A STALL MANEUVER, FOR REASONS UNKNOWN, FROM WHICH RECOVERY WAS NOT ACCOMPLISHED.
Recommendation: REQUIRE THAT FLIGHTCREWS BE PROVIDED WITH INFORMATION IN THE AIRPLANE FLIGHT MANUAL AND BY MEANS OF A SUITABLE PLACARD PLACED IN THE COCKPIT TO INDICATE A PROHIBITION AGAINST INTENTIONAL FULL STALLS ON ALL TWIN-ENGINE AIRPLANES WHICH HAVE NOT BEEN SPIN TESTED.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Unacceptable Action
Mode: Aviation
Location: Wellsburg, WV, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: NYC73AN026
Accident Reports: North American Rockwell, Inc., Turbo Commander 690, N1NR
Report #: AAR-73-05
Accident Date: 8/14/1972
Issue Date: 3/21/1973
Date Closed: 7/26/1973
Addressee(s) and Addressee Status: FAA (Closed - Unacceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 7/26/1973
Response: Closed--unacceptable action.

From: FAA
To: NTSB
Date: 5/25/1973
Response: A REVISED PART 61, FAA FLIGHT TEST GUIDE, AC 61-57, MULTIENGINE AIRPLANES CLASS AND TYPE RATING TO BE PUBLISHED SOON WILL CONTAIN THE FOLLOWING NOTE - NO STALL WILL BE REQUIRED WITH ANY ENGINE THROTTLED OR CUT OFF AND THE OTHER ENGINE(S) DEVELOPING EFFECTIVE POWER. ABRUPT PITCH CHANGES DURING STALL DEMONSTRATIONS AND ALL OTHER MANUEVERS SHOULD BE AVOIDED IN AIRPLANES WITH EXTENSIONS BETWEEN THE ENGINE AND PROPELLER BECAUSE OF THE GYROSCOPIC LOADS INDUCED.