What was found
FLIGHT 728, PHL-GLA: CREW REPORTED A RHYTHMIC KNOCKING SOUND IN THE AREA OF SEAT 13A. FLIGHT RETURNED TO PHL. MAINTENANCE REPLACED THE APU CHECK VALVE.
- Difficulty date
- August 14, 2007
- Submitted
- August 16, 2007
- Operation
- Air carrier
- Aircraft
- N205UW
- Make and model
- Boeing 75723N
- Aircraft serial
- 30887
- Aircraft time
- 21,175 hours, 6,714 cycles
- System (JASC)
- 4900 · Airborne Auxiliary Power Unit (APU) System
- Part
- Check Valve
- Part number
- 32021303
- Part serial
- 2500
- Condition
- Chattering
- Location
- Apu
- Part time
- 2,324 hours, 718 cycles
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.