Service difficulty report · Impeller · Beech B200

Difficulty date
March 20, 2012
Submitted
September 14, 2015
Operation
General aviation
Make and model
Beech B200
Aircraft time
3,373 hours
Engine
Pwa PT642A
Propeller
Hartzl HCE4N3
Part
Impeller
Part number
3036793
Condition
Damaged
Location
Compressor
Part time
3,580 hours
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) ACFT WAS BROUGHT IN FOR A PHASE INSPECTION, PILOTS REPORTED IMMEDIATELY THAT THE BRAKES WHERE SOFT. AS THE AME`S GOT DEEPER INTO THE INSPECTION IT WAS REVEALED THAT THE INTAKES WHERE SEVERELY SAND BLASTED AND THE NOSE WHEEL BEARINGS WHERE GRINDING, FULL OF SAND, THIS INDICATES THAT THE CREW WAS LIKELY USING HEAVY REVERSE TO COMPENSATE FOR THE SOFT BRAKES, DESPITE THE SURFACE CONDITIONS. THE AME`S CONTINUED WITH THE INSPECTION. THE INLET SCREEN WAS REMOVED TO INSPECT THE IMPELLER AND FOUND SEVERE FOD DAMAGE ON THE FIRST STAGE IMPELLER. THE ENGINE WAS SPLIT AND THE BLEED VALVES REMOVED TO INSPECT HOW FAR THE FOD WENT THROUGH THE ENGINE. THE DAMAGE WAS CONTAINED TO THE FIRST STAGE IMPELLER AND NOT THE REST OF THE ENGINE, AN APPROVED REPAIR FACILITY WAS CONTRACTED TO INSPECT AND REPAIR THE DAMAGE AND WERE ABLE TO MAINTAIN MAXIMUM REPAIR LIMITS.

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