SDR ASAA12511418

Service difficulty report · B-Nut · Boeing 737890

Difficulty date: April 16, 2012
Submitted: April 18, 2012
Operation: Air carrier
Aircraft: N516AS
Make and model: Boeing 737890
Aircraft serial: 39044
Aircraft time: 12,549 hours, 4,063 cycles
Engine: Cfmint CFM567B27
System (JASC): 3610 · Pneumatic Distribution System
Part: B-Nut
Condition: Loose
Location: Pressure Reg
Part time: 15,798 hours, 4,875 cycles
Stage of operation: NR
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

RT BLEED TRIP OFF LIGHT ILLUMINATED, EXTINGUISHED AFTER TRIP RESET IAW QRH. ACFT GROUNDED. STARTED FIM 36-10-00-810-801, FOUND 2 LOOSE B-NUT FITTINGS ON PRESSURE REGULATOR, TIGHTENED B-NUT FITTINGS. ALSO, FOUND PRSOV WRENCH TEST STIFF WHEN OPENING IT UP, REPLACED PRSOV IAW AMM 36-11-04-400-801. GROUND FUNCTIONAL CHECKED GOOD IAW AMM 36-11-04-400-801.