SDR ASAA2013012393727

Service difficulty report · Duct · Boeing 737890

Difficulty date: January 23, 2013
Submitted: January 25, 2013
Operation: Air carrier
Aircraft: N557AS
Make and model: Boeing 737890
Aircraft serial: 35176
Aircraft time: 25,373 hours, 7,526 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Duct
Part number: 32145525
Part serial: 4701
Condition: Split
Location: A/C Bay
Part time: 48,043 hours, 22,545 cycles
Stage of operation: CR
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

OBSERVED DUCT PRESSURE SPLIT AT CRUISE AT FL 370. LT PRESSURE 23, RT PRESSURE 43 N1 92.8 LT & RT, N2 95.4 LT & RT. ACFT GROUNDED. INSTALLED SERVICEABLE PRSOV IAW MM 36-11-04-400-801, 12292. INSTALLED SERVICEABLE HIGH STAGE REGULATOR IAW MM 36-11-07-400-801. REPAIR CONFIRMED IAW FIM 36-10, TASK 807, STEP G.