SDR DXTA200702503

Service difficulty report · Pressure Switch · Cessna 750

Difficulty date: September 27, 2007
Submitted: October 8, 2007
Operation: Air carrier
Aircraft: N949QS
Make and model: Cessna 750
Aircraft serial: 7500049
Aircraft time: 8,728 hours, 5,545 cycles
Engine: Allsn AE3007C
System (JASC): 3620 · Pneumatic Indicating System
Part: Pressure Switch
Part number: 1103P0912
Part serial: 0822
Condition: Failed
Location: Aft Service Bay
Part time: 2,044 hours, 1,225 cycles
Stage of operation: TO
How discovered: O
Nature of condition: J
Precautionary procedure: C

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

What was found

ON TAKEOFF, GOT AN AMBER HP DUCT OVER PRESS R CAS MESSAGE, ABORTED TAKEOFF AND RAN CHECKLIST, CAS MESSAGE REMAINED ON AFTER SHUTDOWN. TROUBLESHOT "RT HP. DUCT OVER PRESSURE" EICAS MSG, FOUND RT DUCT OVER PRESSURE. PRESSURE SWITCH FAILED. REMOVED & REPLACED WITH A NEW UNIT PER CE-750 M/M. CH. 36-11-00.

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