Service difficulty report · Precooler · Cessna 525A

Difficulty date
November 21, 2013
Submitted
November 21, 2013
Operation
General aviation
Aircraft
N57HC
Make and model
Cessna 525A
Aircraft serial
525A0098
Aircraft time
2,113 hours, 1,405 cycles
Engine
Wilint FJ44
Part
Precooler
Part number
99144024
Condition
Split
Location
Bleed Air
Part time
2,113 hours, 1,405 cycles
Stage of operation
NR
How discovered
9
Nature of condition
M
Precautionary procedure
O

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

What was found

PILOT REPORTED A HIGH ITT ON THE LT SIDE. DURING A POWER RUN TO CONFIRM TEMP SPLIT WITH BLEEDS ON THE TEMP WAS CLOSE TO THE LIMIT, BLEEDS OFF THE TEMP WAS SLIGHTLY LOWER. AFTER THE RUN, A VISUAL INSPECTION OF THE ACFT REVEALED A BURNED SPOT ON THE PYLON UPPER AND LOWER SKINS. FURTHER INVESTIGATION REVEALED A PRE-COOLER SPLIT AT THE SEAMS. THERE IS NO SYSTEM FOR PYLON LEAK INDICATION IN THE AREA OF THE PRE-COOLER, AND THE BLEED AIR SHUTOFF VALVES ARE DOWNSTREAM OF THE PYLON IN THE TAILCONE.

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