Service difficulty report · Circuit Card · Boeing 747230B

Difficulty date
July 21, 2011
Submitted
July 29, 2011
Operation
Air carrier
Aircraft
N489EV
Make and model
Boeing 747230B
Aircraft serial
23393
Aircraft time
96,601 hours
Part
Circuit Card
Condition
Malfunctioned
Location
Fire Warning
Stage of operation
IN
How discovered
O
Nature of condition
O
Precautionary procedure
K

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

What was found

NR 3 ENGINE "A" FIRE DETECTOR FLUCTUATES BETWEEN 2 AND 5 UNITS - SELECTED "B" LOOP - "B" LOOP TESTS OK. TRANSFERED TO DMI 177 PER MEL 26-1 CAT C DUE 7-31-11 2359Z PLACARD INSTALLED. RE-RACKED NR 3 FIRE WARNING AND DETECTOR CARD PER AMM 26-10-00. OPS CHECK OK PER AMM 26-10-00 DMI 177 CLOSED, PLACARD REMOVED.