# Incident 19970407012699I: Fokker F28MK0100, Philadelphia, PA, April 7, 1997

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: April 7, 1997, 11:45 local time
- Place: Philadelphia, PA
- Airport: Philadelphia International
- Damage: Minor damage
- Phase of flight: Roll-Out (Fixed Wing)
- Operating rules: Air carrier (Part 121)
- Operator: USAA
- Location: 39.8721° N, 75.2407° W: Placed by OpenAirDocs at PHILADELPHIA INTL (PHL), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.8721&lon=-75.2407&mi=10
- Aircraft: N850US, a cancelled registration (https://openairdocs.org/deregistered/N850US-2003-05-28) (OpenAirDocs)
- Registry model: Fokker F.28 MK 0100 (registry code 4990807, https://openairdocs.org/model/fokker-f-28-mk-0100) (OpenAirDocs)
- Reported make and model: FOKKER F28MK0100
- Reported engine: RROYCE TAY65015
- People aboard: 75
- Fatal injuries: 0
- Pilot flight hours: 738 total, 66 in this make and model, 66 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19970407012699I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

NARRATIVE: US AIRWAYS FLIGHT 1446 DEPARTED BOS ENROUTE TO PHL ON 4/7/97. THE CREW NOTED IN THE AIRCRAFT'S LOG THAT "LEFT LG DOWNLOCK SWITCH" FAULT INDICATED ON TAKEOFF FROM BOS. THIS FAULT REQUIRED NO ACTION OTHER THAN THE LOG BOOK NOTATION. ON LANDING AT PHL BOTH LMLG TIRES SHREDDED CAUSING DAMAGE TO THE LEFT WING INBOARD FLAP SHROUD. ON SITE INVESTIGATION REVEALED THAT THE LMLG DOWNLOCK SWITCH WAS BROKEN AT ITS' ATTACH BRACKET TO THE GEAR. EVIDENCE SUGGEST THAT ONE TIRE MAY HAVE BEEN LOST ON TAKE-OFF FROM BOS. THIS WOULD EXPLAIN THE LMLG DOWN LOCK SWITCH FAULT. THAT THE CREW RECEIVED IN THE COCKPIT, AS TIRE DEBRIS STRUCK THE LMLG. THE SECOND TIRE WOULD HAVE BEEN LOST UPON LANDING AT PHL WITH THE FLAPS FULLY EXTENDED. THIS WOULD EXPLAIN THE DAMAGE NOTED TO THE FLAP SHROUD BUT NONE TO THE FLAP. BOS ATCT WAS CONTACTED FOR INFORMATION OF ANY DEBRIS FOUND ON THE RUNWAY THAT FLIGHT 1446 DEPARTED FROM. NONE WAS REPORTED. THE PASSENGERS WERE REMOVED FROM THE AIRCRAFT VIA A MOBILE AIRSTAIR AND BUSSED TO THE TERMINAL. THE AIRCRAFT WAS TOWED TO A MAINTENANCE LOCATION AT PHL. MAINTENANCE CREWS IN PHL REMOVED AND REPLACED BOTH LMLG WHEEL ASSEMBLIES. BOTH FAILED TIRES HAD BEEN PREVIOUSLY INSTALLED ON 02/15/97 AT RIC AND HAD 320 CYCLES LOGGED SINCE THAT INSTALLATION. PHL MAINTENANCE THEN INSPECTED THE ENGINES' INLET & EXHAUST AND THE ENTIRE AIRFRAME FOR DAMAGE. REPORTED DAMAGE TO US AIRWAYS. PIT MAINTENANCE, AND OBTAINED A FERRY PERMIT FOR THE AIRCRAFT WITH THE LANDING GEAR TO REMAIN DOWN. THE DOWNLOCK SWITCH WAS SAFETY WIRED TO THE LMLG FOR THE FERRY FLIGHT TO PIT WHERE ALL REQUIRED CORRECT ACTIONS WOULD BE ACCOMPLISHED. THIS INCIDENT IS CONSIDERED CLOSED.

## Other reports on N850US (3)

Matched to the same aircraft by N-number and date.

- [Incident 19901111057209I](https://openairdocs.org/incident/19901111057209I), Nov 11, 1990: Fokker F28MK4000 (N850US), Atlanta, GA. On descent computer fault light and stabilizer trim fault lights came on. Autopilot disengaged.
- [Incident 19901029062839I](https://openairdocs.org/incident/19901029062839I), Oct 29, 1990: Fokker F28MK0100 (N850US), Erie, PA. During departure from gate the tail touched tail of adjacent DC9. Returned to gate.
- [Incident 19900902047949I](https://openairdocs.org/incident/19900902047949I), Sep 2, 1990: Fokker F28MK0100 (N850US), Syracuse, NY. Precautionary landing when hydraulic system for stabilator failed. Replaced sticking switches and alternate motor.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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