SDR SAJFCALS103016

Service difficulty report · Acm · Boeing 747409

Difficulty date: May 8, 2014
Submitted: May 12, 2014
Operation: Air carrier
Aircraft: N18203
Make and model: Boeing 747409
Aircraft serial: 28711
System (JASC): 2150 · Cabin Cooling System
Part: Acm
Condition: Malfunctioned
Location: Ac Bay
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

EICAS MSG PACK 2 SHOWS AT HKG, IAW MEL 20-51-01-01, FCSOV SECURED CLSD. CRUISING AT FLT 350, CABIN ALT UP TO 9300', REQUEST DOWN TO FLT 220, CABIN ALT 6300' REDUCING CONTINUE BACK TO NML UNTIL LANDING. AFTER LANDING EICAS MSG PACK 1 & PACK 3 DISPLAY. NR 1 & NR 3 ACM REPLD. NR 2 OVERHEAT SW 2 EA REPLD.