NTSB Identification: DEN08IA022.
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Nonscheduled 14 CFR United Parcel Service
Incident occurred Friday, November 02, 2007 in Wichita, KS
Probable Cause Approval Date: 03/31/2008
Aircraft: Douglas DC-8-73F, registration: N880UP
Injuries: 4 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

The airplane was in cruise flight when the crew detected a strange odor. When the captain opened the cockpit door, he saw smoke in the courier area. The crew donned oxygen masks, declared an emergency, and diverted to the nearest suitable airport. The crew then noticed heavy smoke coming from the lavatory and heard a motor running continuously. The captain discharged a Halon fire extinguisher into the lavatory compartment and the smoke subsided. Post-incident examination revealed the lavatory fan functioned normally, but the recirculation fan, located beneath the lavatory, had seized. The motor end ball bearing, located below the fan rotor, had failed, allowing the motor rotor to make contact with the motor stator.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

Failure of the recirculation fan motor end ball bearing.

Full narrative available

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