ASN Wikibase Occurrence # 375388
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| Date: | Thursday 27 March 1986 |
| Time: | 00:41 LT |
| Type: |  Boeing 727-231 |
| Owner/operator: | Trans World Airlines (TWA) |
| Registration: | N52311 |
| MSN: | 19830/633 |
| Year of manufacture: | 1968 |
| Total airframe hrs: | 44246 hours |
| Engine model: | P&W JT8D-9A |
| Fatalities: | Fatalities: 0 / Occupants: 96 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Boston, MA -
 United States of America
|
| Phase: | Taxi |
| Nature: | Passenger - Scheduled |
| Departure airport: | Saint Louis-Lambert International Airport, MO (STL/KSTL) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
TWO OF 3 REQD FLT ATTENDANTS (F/A'S) WERE DISTRIBUTING PASSENGER (PAX) COATS AS THE ACFT WAS BEING TAXIED AFTER LNDG. SMOKE FM AN OVERHEATED AIR COND (A/C) PACK BGN ENTERING THE CABIN & THE F/A'S RETURNED TO THEIR DUTY STATIONS. THE FLT CREW STOPPED THE ACFT AT THE GATE & SHUT DWN THE ENGS, BUT LEFT THE APU RUNNING TO PROVIDE ELECTRICITY FOR LIGHTING. THEF/A'S OPENED THE L FWD DOOR & GND PSNL OPENED THE REAR STAIR DOOR TO DEPLANE THE PAX. THE CAPT MADE AN ANNOUNCEMENT TO KEEP THE PAX CALM, BUT SMOKE BCM DENSE & PAX OPENED THE EMERG EXITS OVR THE WINGS & BGN EXITING FM THEM. TWO PAX RCVD MINOR INJURIES WHILE EXITING OVR THE WINGS. AN INVESTIGATION REVEALED THE ACFT HAD BEEN DISPATCHED WITH THE R PACK COOL-ING FAN INOP AS AUTHORIZED BY THE MIN EQUIP LIST (MEL). DRG FLT, A RADIO INTERFERENCE FILTER IN THE A/C SYS FAILED WHICHALLOWED THE FWD PACK SHUT-OFF VALVE TO OPEN, BUT NOT CLOSE. THIS PERMITTED APU AIR TO RUN THE AFFECTED PACK EVEN THO THESWITCH WAS OFF & A CIRCUIT BRKR WAS PULLED. WITH THE ENGS SHUT DOWN & THE R COOLING FAN INOP, THE SYS OVERHEATED.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB NYC86IA093
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Mar-2024 19:24 | ASN Update Bot | Added |
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