SDR ASAA2019021428191

Service difficulty report · Warning System · Boeing 737890

Difficulty date: February 14, 2019
Submitted: February 20, 2019
Operation: Air carrier
Aircraft: N596AS
Make and model: Boeing 737890
Aircraft serial: 35688
Aircraft time: 40,958 hours, 12,459 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Warning System
Condition: False Activation
Location: Cockpit
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

RIGHT PACK LIGHT ILLUMINATED DURING RECALL. EXTINGUISHED AFTER RESET. GROUNDED - YES. PERFORMED RIGHT PZTC BITE & FAULT REVIEW REF AMM 21-51-00. FOUND 1 HIT FOR RIGHT RAM AIR ACT IN PREV FLT. NO FAULTS IN BIT OR VERIFY. RESET FAULTS. VERIFIED PROPER RT RAM AIR DOOR OPERATION DURING VERIFY TEST/BITE. NO FAULTS. PERFORMED RT PACK/CABIN TEMP CONT AND IND OPS TEST REF AMM 21-61-00. OPS CKS GOOD. NO PACK LT NR 2 30 DAY HISTORY. ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL.