ASN Wikibase Occurrence # 365885
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| Date: | Wednesday 5 December 1990 |
| Time: | 06:15 LT |
| Type: |  Boeing 727-257 |
| Owner/operator: | Northwest Airlines |
| Registration: | N715RC |
| MSN: | 22019/1584 |
| Year of manufacture: | 1980 |
| Engine model: | P&W JT80-17 |
| Fatalities: | Fatalities: 0 / Occupants: 76 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Detroit, MI -
 United States of America
|
| Phase: | Standing |
| Nature: | Unknown |
| Departure airport: | Seattle, WA (KSEA) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE INCIDENT AIRPLANE EXPERIENCED AN APU FIRE SHORTLY AFTER LANDING WHEN THE APU WAS STARTED. THE AIRPLANE HAD BEEN DEICED AT ITS POINT OF DEPARTURE WITH A GLYCOL AND WATER MIX. COMPANY POLICY CALLED FOR THE FLIGHT CREW TO SHUT OFF THE APU DURING DEICING. THE APU EXHAUST OUTLET IS ON TOP OF THE RIGHT WING NEAR THE FUSELAGE, AND WILL ACCEPT DEICE FLUID INTO THE EXHAUST AND SUBSEQUENTLY THE APU COMBUSTION CHAMBER IF DEICING FLUID IS DIRECTED INTO THE OPENING. GLYCOL IS HIGHLY FLAMMABLE ONCE THE WATER IS VAPORIZED/EVAPORATED. THE APU START FOLLOWING THE LANDING AT DETROIT IGNITED THE RESIDUAL GLYCOL IN THE APU, CAUSING THE EXHAUST STACK FIRE.
Probable Cause: THE INADEQUATE DEICING PROCEDURES INSTITUTED BY COMPANY MANAGEMENT.
Accident investigation:
 |
|
Sources:
NTSB CHI91IA041
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Mar-2024 15:03 | ASN Update Bot | Added |
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