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Safety Recommendation Details

Safety Recommendation A-71-023
Details
Synopsis: THE NATIONAL TRANSPORTATION SAFETY BOARD IS PRESENTLY INVESTIGATING THE WESTERN AIR LINES BOEING 720B TRAINING ACCIDENT WHICH OCCURRED DURING A "HIGH DRAG" APPROACH WITH A SIMULATED INOPERATIVE ENGINE ATTHE ONTARIO INTERNATIONAL AIRPORT, ONTARIO, CALIFORNIA, MARCH 31, 1971.
Recommendation: ALL BOEING 707/720 OPERATORS BE INFORMED OF THE POTENTIAL HAZARD INVOLVED IN LOW-ALTITUDE, HIGH-ASYMMETRIC THRUST CONDITIONS IN THE EVENT THAT FAILURE OF THE RUDDER ACTUATOR SUPPORT FITTING SHOULD OCCUR.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable 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: 4/9/1971
Date Closed: 5/17/1971
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: FAA
To: NTSB
Date: 4/30/1971
Response: THE FAA ISSUED OPERATIONAL ALERT NOTICE NO. 8430, DATED 4/9/71, INFORMING AFFECTED AIRCRAFT OPERATORS OF THE FAILURES AND ADVISING THAT SIMULATED ENGINE FAILURES AT LOW ALTITUDE NOT BE PERFORMED IN BOEING 707/720 AIRCRAFT UNTIL EITHER A 7075-T73 SUPPORT FITTING IS INSTALLED IN ACCORDANCE WITH AIRWORTHINESS DIRECTIVE 69-13-2 OR AN INSPECTION HAS BEEN PERFORMED WITHIN THE PREVIOUS 100 HOURS IN ACCORDANCE WITH REVISION NO. 5, DATED 2/3/71, TO BACO SERVICE BULLETIN 2903 (AD AMENDMENT 39-1174)