Skip Ribbon Commands
Skip to main content
Safety Recommendation Details

Safety Recommendation A-85-121
Details
Synopsis: ON SEPTEMBER 6, 1985, A MCDONNEL DOUGLAS DC-9 AIRPLANE WITH PRATT & WHITNEY JT8D-7 ENGINES INSTALLED CRASHED SHORTLY AFTER TAKEOFF FROM RUNWAY 19R AT GENERAL MITCHELL FIELD, MILWAUKEE, WISCONSIN. THE AIRPLANE WAS OWNED AND OPERATED BY MIDWEST EXPRESS AIRLINES AND WAS ON A REGULARLY SCHEDULED PASSENGER FLIGHT. THE AIRPLANE WAS DESTROYED IN THE CRASH, AND ALL 31 PERSONS ABOARD WERE KILLED. REPORTEDLY, WITNESSES HEARD A LOUD BANG DURING THE AIRPLANE'S INITIAL CLIMB AND SAW SMOKE COMING FROM ITS RIGHT ENGINE. THE NATIONAL TRANSPORTATION SAFETY BOARD'S INVESTIGATION OF THE ACCIDENT IS CONTINUING. THE PRELIMINARY INVESTIGATION HAS DISCLOSED THAT 9TH- AND 10TH-STAGE HIGH-PRESSURE (HP) COMPRESSOR BLADES AND SPACER PARTS SEPARATED FROM THE RIGHT ENGINE DURING TAKEOFF.
Recommendation: NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: NOTIFY APPROPRIATE FOREIGN CIVIL AVIATION AUTHORITIES AND FOREIGN OPERATORS OF AIRPLANES EQUIPPED WITH PRATT & WHITNEY JT8D-SERIES ENGINES OF THE FAILURES ASSOCIATED WITH THE REMOVABLE SLEEVE SPACERS INSTALLED IN THE HIGH-PRESSURE COMPRESSOR ROTOR AND OF THE ACTIONS WHICH SHOULD BE TAKEN TO MINIMIZE OR ELIMINATE THE FAILURES.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Aviation
Location: MILWAUKEE, WI, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA85AA036
Accident Reports: Midwest Express Airlines, Inc., DC-9-14, N100ME
Report #: AAR-87-01
Accident Date: 9/6/1985
Issue Date: 11/8/1985
Date Closed: 5/13/1986
Addressee(s) and Addressee Status: FAA (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: FAA
Date: 5/13/1986
Response: We are pleased that the NPRM regarding failures associated with the removable sleeve spacers installed in the high-pressure compressor rotor has been sent to foreign authorities and that they will be immediately notified of actions resulting from this proposal. This recommendation is classified "Closed--Acceptable Action."

From: FAA
To: NTSB
Date: 2/21/1986
Response: "THE FAA HAS SENT A COPY OF THE NPRM TO THE APPROPRIATE FOREIGN CIVIL AVIATION AUTHORITIES FOR THEIR REVIEW. WHEN THE FINAL ACTION IS TAKEN, THE FOREIGN AUTHORITIES WILL IMMEDIATELY BE NOTIFIED".