Accident · 2001-03-06

What the record says

Event date

2001-03-06

Event type

Accident

Highest injury level

No injuries

Aircraft

de Havilland DHC-8-102 (N822PH)

Operating rule

Part 121

Operator

HORIZON AIR INDUSTRIES, INC. Operator named in NTSB report

Operated by (per NTSB report)

Horizon Air Industries, Inc.

Probable cause

The failure of the number 5 engine bearing assembly followed by the disconnection of the P2.5/P3 switching valve to rear inlet case sealing air tube and the melting of the NL probe port (sealing tube) which allowed an oil fed fire beyond the constraints of the engine casing and into the engine nacelle. A contributing factor was the company's failure to follow several maintenance procedures within the maintenance manual after a previous oil loss event. A second factor was the omission of the PW120A engine from the airworthiness directive issued by the FAA which mandated the completion of Pratt & Whitney service bulletin 20914. The lack of inclusion of the PW120A engine in the AD resulted in the company’s correct interpretation that the service bulletin was not mandatory.

Flight crew

Flight-crew details for this event aren't in the NTSB database extract we hold (its coverage starts with 2008 events) — a gap in our data, not an absence of crew.