Service difficulty report · Battery Pack · Boeing 7377H4

Difficulty date
December 8, 2023
Submitted
December 13, 2023
Operation
Air carrier
Aircraft
N233LV
Make and model
Boeing 7377H4
Aircraft serial
32501
Aircraft time
59,250 hours, 35,411 cycles
Part
Battery Pack
Part number
UNKNOWN
Condition
Inoperative
Location
Zn 200 Fus Top
Stage of operation
IN
How discovered
9
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

MULTIPLE EMERGENCY LIGHT INOP EMERGENCY LIGTHS STA 603 LH & RH; STA 727 L/H; STA 952 LH & RH INOPS<[01] PERFORMED EMERGENCY LIGHTING PROBLEM AS PER REF FIM 33-50 TASK 801 FINDING THE FOLLOWING POWER SUPPLY BATTERY PACKS DEFECTIVE IN POSITION: <BR>M1668 BATTERY PACK STA 603 LEFT<BR>M1669 BATTERY PACK STA 603 RIGHT<BR>M1670 BATTERY PACK STA 727C LEFT<BR>M1672 BATTERY PACK STA 952 RIGHT<BR>M1673 BATTERY PACK STA 952 LEFT<BR>PERFORMED REPLACEMENT OF DEFECTIVE POWER SUPPLY BATTERY PACKS AS PER REF AMM 33-51-06-960-805. TEST FOUND NORMAL.;[02] PERFORMED EMERGENCY LIGHTING PROBLEM AS PER REF FIM 33-50 TASK 801 FINDING THE FOLLOWING POWER SUPPLY BATTERY PACKS DEFECTIVE IN POSITION:<BR>M1668 BATTERY PACK STA 603 LEFT<BR>M1669 BATTERY PACK STA 603 RIGHT<BR>M1670 BATTERY PACK STA 727C LEFT<BR>M1672 BATTERY PACK STA 952 RIGHT<BR>M1673 BATTERY PACK STA 952 LEFT<BR>PERFORMED REPLACEMENT OF DEFECTIVE POWER SUPPLY BATTERY PACKS AT POSITION M1668; M1669; M1670; M1672 AND M1673 AS PER REF AMM 33-51-06-960-805. TEST FOUND NORMAL.;[03] VERIFIED STEP 2.

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