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Safety Recommendation Details

Safety Recommendation A-80-055
Details
Synopsis: ON MAY 6, 1980, A LEARJET MODEL 23 AIRCRAFT CRASHED WHILE ATTEMPTING A NIGHT LANDING ON RUNWAY 33 AT BYRD FIELD, RICHMOND, VIRGINIA. THE SKIES WERE CLEAR, VISIBLITY WAS 10 MI, AND THE WIND WAS CALM. ALTHOUGH THE LEARJET WAS SLIGHTLY HIGH ON THE APPROACH, IT DESCENDED NORMALLY IN A LANDING ATTITUDE. BUT BEFORE TOUCHING DOWN, THE AIRCRAFT YAWED AND ROLLED, AND FIRST THE RIGHT WINGTIP FUEL TANK AND THEN THE LEFT TIPTANK STRUCK THE RUNWAY. THEREAFTER, THE NOSE OF THE AIRCRAFT PITCHED UP, THE ENGINE THRUST INCREASED, THE AIRCRAFT ROLLED TO THE RIGHT, AND IT CRASHED IN A NEARLY INVERTED ATTITUDE. A FIRE ERUPTED AFTER IMPACT, AND BOTH PILOTS, AND ONLY PERSONS ABOARD, WERE KILLED. THE AIRCRAFT HAD BEEN MANUFACTURED IN 1964. AVAILABLE OPTIONAL SLOW-FLIGHT MODIFICATIONS INSTALLED ON MANY LEARJETS HAD NOT BEEN INSTALLED ON THIS AIRCRAFT.
Recommendation: THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: EVALUATE INFORMATION CONTAINED IN THE GATES LEARJET SERVICE NEWS LETTER 49 DATED MAY 1980 PERTAINING TO PROCEDURES TO BE FOLLOWED IF THE AIRCRAFT INADVERTENTLY EXCEEDS VMO/MMO AND, BASED ON THIS EVALUATION, REQUIRE APPROPRIATE REVISIONS TO THE AIRCRAFT FLIGHT MANUAL. (URGENT)
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: Richmond, VA, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA80AA017
Accident Reports: Gates Learjet Model 23, N886JS
Report #: AAR-80-12
Accident Date: 5/6/1980
Issue Date: 6/27/1980
Date Closed: 5/17/1983
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 5/17/1983
Response: We note that the faa has evaluated the procedure of extending the landing gear when vmo/mmo is inadvertently exceeded. As a result of these flight tests, the faa approved a change to the learjet airplane flight manual emergency procedure authorizing this procedure which was effective on february 5, 1982. This action Data Source: NTSB Recommendations to FAA and FAA Responses satisfies the intent of safety recommendation a-80-55 which has been classified as closed--acceptable action. We note as well that gates learjet corporation has instituted training programs entitled checklist which are oriented toward pilot professionalism among those flying learjet models. The safety board appreciates your attention to these safety recommendations.

From: FAA
To: NTSB
Date: 6/28/1982
Response: FAA LETTER: THE FAA HAS EVALUATED THE PROCEDURE OF EXTENDING LANDING GEAR WHEN VMO/MMO IS INADVERTENTLY EXCEEDED. AS A RESULT, THE FAA HAS APPROVED A CHANGE TO THE LEARJET AIRPLANE FLIGHT MANUAL EMERGENCY PROCEDURE WHICH WAS EFFECTIVE FEBRUARY 5, 1982.

From: NTSB
To: FAA
Date: 5/3/1982
Response:

From: NTSB
To: FAA
Date: 1/8/1981
Response: In safety recommendation a-80-55, we recommended that the faa evaluate information contained in the gates learjet service news letter 49 dated may 1980, pertaining to procedures to be followed if the aircraft inadvertently exceeded vmo/mmo; and the faa require appropriate revisions to the aircraft flight manual based on this evaluation. We realize that the faa's responsive actions to a-80-53 and a-80-55 are closely related and are subject to the faa's continuing investigation. We have noted the issuance of genot on may 22, 1980, and general aviation airworthiness alert, ac no. 43-16, in june 1980, regarding unapproved alterations to speed warning systems. Pending the faa's further response, this recommendation is classified in an open--acceptable action status.

From: FAA
To: NTSB
Date: 9/25/1980
Response: FEDERAL AVIATION ADMINISTRATION LTR: THIS RECOMMENDATION IS INCLUDED IN FAA'S INVESTIGATION RELATIVE TO NTSB SAFETY RECOMMENDATION A-80-53. ALSO, FAA'S OFFICE OF FLIGHT OPERATIONS HAS ESTABLISHED A SEPARATE ITEM TO REVIEW THE ADEQUACY AND EFFECTIVENESS OF LEARJET CREW TRAINING. IN ADDITION, A GENOT WAS DISTRIBUTED ON MAY 22, 1980, TO ALL GADO'S, FSDO'S, AND ACDO'S. THIS GENOT REQUESTED THE IMMEDIATE INSPECTON OF ALL LEARJET AIRCRAFT FOR SWITCHES. SEVEN INSTANCES OF AIRCRAFT WITH UNAPPROVED CUT-OUT SWITCH INSTALLATIONS HAVE BEEN REMOVED. FINALLY ON JUNE 2, 1980, A SPECIAL ISSUE OF GENERAL AVIATION AIRWORTHINESS ALERTS WAS PUBLISHED. THIS ALERT ADDRESSED THE SUBJECT OF UNAPPROVED ALTERATIONS OF SPEED WARNING SYSTEMS IN BOTH AIR CARRIER AND GENERAL AVIATION AIRCRAFT.