Service difficulty report · Warning Light · Boeing 737990ER

Difficulty date
December 29, 2019
Submitted
December 31, 2019
Operation
Air carrier
Aircraft
N433AS
Make and model
Boeing 737990ER
Aircraft serial
41704
Aircraft time
24,498 hours, 7,900 cycles
Part
Warning Light
Condition
False Activation
Location
Lt A/C Pack
Stage of operation
NR
How discovered
O
Nature of condition
N
Precautionary procedure
O

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

What was found

LEFT PACK LIGHT ILLUMINATES DURING MASTER RECALL. LIGHT EXTINGUISHES WHEN MASTER RESET. GROUNDED - YES. #1 PZTC FAULTS SRADA "RAM AIR SNSR" AND "INLET". FOUND SRADA STOWAGE LINK STILL INSTALLED IN RAM AIR EXHAUST MODULATING SYSTEM. REVERSED CONFIGURATION CHANGES FROM PREVIOUS MEL 21-5D, EVERYTHING BACK IN NORMAL CONFIGURATION. BITE CHECK OF #1 PZTC NML, REF MM 21-61-00. ETOPS GRD VERIFICATION VERIFIED.