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20110203002419I

Incident · No damage
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FAA incident report · Raytheon Ai BAE 125-800 · Chesterfield, MO · February 3, 2011

FAA Aviation Safety Information Portal

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Date
February 3, 2011 · 07:00 local
Place
Chesterfield, MO
Airport
Spirit Of St. Louis Airport
Phase of flight
Takeoff: Climb Out
Operating rules
Air taxi and commuter (Part 135)
Operator
UVCA
Damage
No damage
Aircraft
N705BB
Reported as
Raytheon Ai BAE 125-800
Reported engine
Garrett TFE731-5R
People aboard
6
Fatal injuries
0
Other injuries
0
Pilot’s certificates
Airline transport, flight instructor
Pilot’s flight hours
3,800 total1,800 in this make and model120 in the last 90 days
N705BBRegistration cancelled Mar 29, 2017 · Raytheon BAE 125-800AS/N 258015 · Built 1984Airframe modelRaytheon BAE 125-800AEngine modelGarrett TFE731 seriesTurbo-fan

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry 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.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

PILOT HEARD A LOUD BANG FROM THE LEFT ENGINE AND NOTICED ITT DECREASING. ENGINE WAS SHUT DOWN AND PILOT RETURNED TO KSUS, APPROXIMATELY 24 MILES WITHOUT INCIDENT. AMENDED 09/27/2011 AS FOLLOWS: Inspection of the engine tailpipe revealed ferrous metal particles approximately the size of large grains of sand in the tailpipe and a slight scrapping sound could be heard during manual rotation of the engine turbine. Disassembly of the engine revealed two disk posts separated from the stage 2 low pressure compressor. Examination of the disc by the engine manufacturer concluded the posts separated due to high cycle fatigue. The root cause of the disc post separations could not be determined. To address the fretting of the rotating shroud and disc the engine manufacturer is in the process of releasing Service Bulletin TFE731-72-3777.

As the FAA filed it

PILOT HEARD A LOUD BANG FROM THE LEFT ENGINE AND NOTICED ITT DECREASING. ENGINE WAS SHUT DOWN AND PILOT RETURNED TO KSUS, APPROXIMATELY 24 MILES WITHOUT INCIDENT. AMENDED 09/27/2011 AS FOLLOWS: Inspection of the engine tailpipe revealed ferrous metal particles approximately the size of large grains of sand in the tailpipe and a slight scrapping sound could be heard during manual rotation of the engine turbine. Disassembly of the engine revealed two disk posts separated from the stage 2 low pressure compressor. Examination of the disc by the engine manufacturer concluded the posts separated due to high cycle fatigue. The root cause of the disc post separations could not be determined. To address the fretting of the rotating shroud and disc the engine manufacturer is in the process of releasing Service Bulletin TFE731-72-3777.