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Safety Recommendation Details

Safety Recommendation A-91-088
Details
Unfortunately, this safety recommendation was not found.

Safety Recommendation History
From: NTSB
To: FAA
Date: 1/7/1999
Response: THE FAA STATED THAT IT DEVELOPED A COMPREHENSIVE PROGRAM TO SCREEN AND RANK THE TURBOPROPELLER FLEET BASED ON THE TAILPLANE STALL MARGIN UNDER CERTAIN AERODYNAMIC AND ICE ACCRETION CONDITIONS AND THAT FAA CERTIFICATION OFFICES REVIEWED THE RESULTS OF THE STUDY AND, WHERE APPROPIATE, TOOK CORRECTIVE ACTION. BECAUSE A REVIEW OF THE SUPPORTING DOCUMENTS PERTAINING TO THE ISSUE INDICATES THAT THE ITEMS OF CONCERN IN A-91-88 HAVE BEEN ADDRESSED, IT IS CLASSIFIED "CLOSED--ACCEPTABLE ACTION."

From: FAA
To: NTSB
Date: 9/1/1998
Response: THE FAA DEVELOPED A COMPREHENSIVE PROGRAM TO SCREEN AND RANK THE TURBOPROPELLER FLEET BASED ON THE TAILPLANE STALL MARGIN UNDER CERTAIN AERODYNAMIC AND ICE ACCRETION CONDITIONS. FAA CERTIFICATION OFFICES REVIEWED THE RESULTS OF THE STUDY AND , WHERE APPROPRIATE, TOOK CORRECTIVE ACTION. THE FOLLOWING IS A SUMMARY OF AIRPLANE-SPECIFIC AIRWORTHINESS DIRECTIVES (AD) RELATED TO ICE CONTAMINATION TAILPLANE STALLS: AD 96-03-04, EFFECTIVE 2/28/96, APPLIES TO CONVAIR CV@240 (INCLUDING THE T-29), CV-340, CV-440, AND C-131, INCLUDING THOSE MODIFIED FOR TURBOPROPELLER POWER. THIS AD REQUIRES THAT THE FLIGHTCREW LIMIT THE FLAP SETTINGS DURING CERTAIN ICING CONDITIONS AND AIR TEMPERATURES. AD 94-25-10, EFFECTIVE 12/28/94, APPLIES TO BEECH 400, 400A, 400T, MU-300-10, AND MITSUBISHI MU-300. THIS AD REQUIRES REVISION TO THE AIRPLANE FLIGHT MANUAL THAT PROVIDES PILOTS WITH SPECIAL OPERATING PROCEDURES DURING ICING CONDITIONS. AD 86-06-03 R1, EFFECTIVE 6/17/88, APPLIES TO THE 340A. REVISION 1 AMMENDS AD 86-06-03, WHICH REQUIRES THE INSTALLATION OF A POSITIVE STOP TO LIMIT THE MAXIMUM FLAP SETTING TO 20 DEGREES TO PREVENT UNCOMMANDED PITCH EXCURSION. THIS REVISION PROVIDES FOR OPTIONAL MODIFICATIONS WHICH, IF INCORPORATED, ALLOW REMOVAL OF THE LIMITATIONS REQUIRED BY AD 86-06-03. AD 96-03-04, EFFECTIVE 2/28/96, APPLIES TO CONVAIR CV240 (INCLUDING THE T-29), CV-340, CV-440, AND C-131, INCLUDING THOSE MODIFIED FOR TURBOPROPELLER POWER. THIS AD REQUIRES THAT THE FLIGHTCREW LIMIT THE FLAP SETTINGS DURING CERTAIN ICING CONDITIONS AND AIR TEMPERATURES. AD 86-20-02, EFFECTIVE 10/15/86, APPLIES TO THE ATR, THIS AD REQUIRES THE INSTALLATION OF A POSITIVE STOP TO LIMIT THE MAXIMUM FLAP SETTING TO 30 DEGREES AND AN AMENDMENT TO THE FAA-APPROVED AIRPLANE FLIGHT MANUAL. NPRM (98-NM-84-AD) APPLIES TO THE LOCKHEED L-188A AND L-188C. THIS NP PROPOSES TO REQUIRE THE FLIGHTCREW TO LIMIT THE FLAP SETTINGS DURING CERTAIN ICING CONDITIONS AND AIR TEMPERATURES. COMMENT PERIOD ENDS 9/28/98. 14 CFR PART 23 AD 93-01-02, EFFECTIVE 1/22/93, APPLIES TO JETSTREAM 3101 SERIES AIRPLANES. THIS AD PREVENTS TAILPLANE DEICING SYSTEM FAILURE. AD 95-02-06, EFFECTIVE 3/10/95, APPLIES TO JETSTREAM 3101 AIRPLANES (ALL SERIAL NUMBERS). THIS AD SUPERSEDES AD 91-08-01 AND REQUIRES FLAP JACK EXTENSION LIMIT TO 35 DEGREES. AD 82-20-02, EFFECTIVE 12/30/82, APPLIES TO EMBRAER EMB 3-11OP1 AND 11OP2. THIS AD SUPERSEDES AD 82-15-06 AND REQUIRES PNEUMATIC SYSTEM MODIFICATION TO PREVENT LOSS OF CONTROL OF THE AIRPLANE, DURING APPROACH AND LANDING IN ICING CONDITIONS. AD 86-01-01 R2, EFFECTIVE 7/13/87, APPLIES TO CESSNA T303. THIS AD REQUIRES AERODYNAMIC MODIFICATION OF THE AIRPLANE, DUE TO ACCUMULATION OF ICE AT THE UNPROTECTED JUNCTURES OF THE HORIZONTAL AND VERTICAL TAIL. I BELIEVE THAT THE REVIEW OF AIRFRAME ICING CERTIFICATION DATA REQUESTED BY THE BOARD HAS BEEN COMPLETED AND THAT THE INTENT OF THIS SAFETY RECOMMENDATION HAS BEEN MET. I HAVE ENCLOSED COPIES OF ALL DOCUMENTS MENTIONED ABOVE, AND I CONSIDER THE FAA'S ACTION TO BE COMPLETED ON THIS SAFETY RECOMMENDATION.

From: NTSB
To: FAA
Date: 7/18/1996
Response: THE BOARD NOTES THAT THE FAA DEVELOPED A PROGRAM TO SCREEN & RANK THE TURBOPROLLER FLEET BASED ON THE TAILPLANE STALL MARGIN UNDER CERTAIN AERODYNAMIC & ICE ACCRETION CONDITIONS. FAA CERTIFICATION OFFICES THEN REVIEWED THE RESULTS OF THE STUDY &, WHERE APPROPRIATE, TOOK CORRECTIVE ACTION. SOME AIRCRAFT, SUCH AS THE EMBRAER EMB-120, HAVE HAD EXTENSIVE WORK DONE TO THEM & NOW MEET THE FAA'S STANDARDS FOR CONTROLLABILITY. OTHERS SUCH AS THE CONVAIR 240 SERIES & THE LOCKHEED L-188, DO NOT MEET FAA STANDARD & AIRWORTHINESS DIRECTIVES OR NOTICES OF PROPOSED RULEMAKING ABOUT THEM MAY BE ISSUED. PENDING THE FAA'S ISSUANCE OF RELEVANT NPRMS & ADS & THEIR REVIEW BY THE BOARD A-91-88 IS CLASSIFIED "OPEN--ACCEPTABLE RESPONSE."

From: FAA
To: NTSB
Date: 2/13/1996
Response: FAA CERTIFICATION OFFICES REVIEWED THE RESULTS OF A STUDY THAT SCREENED & RANKED TURBOPROPELLER AIRPLANES BASED ON THE TAILPLANE STALL MARGIN & WHERE APPROPRIATE, TOOK CORRECTIVE ACTION. SOME AIRCRAFT HAVE HAD EXTENSIVE WORK DONE TO THEM & NOW MEET THE FAA'S STANDARD FOR CONTROLLABILITY. OTHERS DO NOT MEET FAA STANDARDS & ARE IN THE PROCESS OF HAVING AIRWORTHINESS DIRECTIVES OR NOTICE OF PROPOSED RULEMAKING ISSUED ON THEM.

From: NTSB
To: FAA
Date: 4/10/1992
Response: Safety Recommendations A-91-88 through -90 and A-91-122 also pertain to aircraft ice protection. We note that the FAA agrees with these safety recommendations and is taking action towards their satisfactory resolution. Pending the FAA's further response, these safety recommendations are classified as "Open--Acceptable Response."

From: FAA
To: NTSB
Date: 1/31/1992
Response: THE FAA AGREES WITH THIS SAFETY RECOMMENDATION AND HAS INITIATED A PROGRAM TO DEVELOP CRITERIA TO BE USED IN DEFINING FLIGHT PROFILES, ICING LEVELS, AND CONFIGURATIONS TO BE EXPLORED IN ICING CERTIFICATION. THE PROGRAM INCLUDES THE ACTIONS PROPOSED BY THE SAFETY BOARD, AS WELL AS OTHER RECOMMENDATIONS PROPOSED AT THE INTERNATIONAL TAILPLANE ICING WORKSHOP WHICH WAS HELD 11/5-6/91. THE FAA'S TRANSPORT AIRPLANE AND SMALL AIRPLANE DIRECTORATES WILL WORK TOGETHER WITH INDUSTRY TO DEFINE THE REVIEW PARAMETERS AND ADDRESS THE NEED FOR ADDITIONAL FLIGHT TESTING. IT IS ANTICIPATED THAT THE DEFINITION OF THE EVALUATION CRITERIA WILL BE COMPLETED BY JULY 1992. THE FAA WILL REVIEW THE EXISTING CERTIFICATION DATA AT THAT TIME.