Cabin Attendant Work Light Fault
TASK 33-27-00-810-801-A
Cabin Attendant Work Light Fault
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 33-27-00-710-050-A Subtask 33-27-00-710-051-A 4. Fault Isolation
Subtask 33-27-00-810-056-A ** ON A/C NOT FOR ALL
Subtask 33-27-00-860-050-A
[Rev.8 from Aug 2018]
2026.04.04 04:31:56 UTC
Cabin Attendant Work Light Fault
1. Possible Causes
- WORK LIGHT
- STA PISA [203LZ]
- STA PISA [212LZ]
- lamp
- PUSHBUTTON SWITCH
- wiring
SWITCH PANEL (2062VU) SWITCH PANEL (2063VU) - PWR UNIT
- FAP [120RH]
- RELAY-SYS PWR SPLY [2LZ]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 23-73-00-740-005 | BITE-Test of the Cabin Intercommunication Data System (CIDS) through the CFDS |
| AMM 23-73-15-000-001 | Removal of the Light Module |
| AMM 23-73-15-400-001 | Installation of the Light Module |
| AMM 33-27-00-710-001 | Operational Test of the Cabin Attendant Work-Light |
| ASM 332701 | |
| AMM 33-27-12-000-001 | Removal of the Cabin Attendant Work-Lights |
| AMM 33-27-12-400-001 | Installation of the Cabin Attendant Work-Lights |
| AMM 33-27-38-000-001 | Removal of the Power Unit for the Cabin Attendant Work-Light |
| AMM 33-27-38-400-001 | Installation of the Power Unit for the Cabin Attendant Work-Light |
| AMM 33-27-41-000-001 | Removal of the Stand-Alone Passenger Interface and Supply Adapter (StA-PISA) |
| AMM 33-27-41-400-001 | Installation of the Stand-Alone Passenger Interface and Supply Adapter (StA-PISA) |
Subtask 33-27-00-710-050-A Subtask 33-27-00-710-051-A 4. Fault Isolation
Subtask 33-27-00-810-056-A ** ON A/C NOT FOR ALL
A. If the operational test gives the maintenance message WORK LIGHT FWD 1,2,L,R
or WORK LIGHT MID 1,2,L,R or WORK LIGHT AFT 1,2,L,R:
Subtask 33-27-00-810-057-A ** ON A/C NOT FOR ALL or WORK LIGHT MID 1,2,L,R or WORK LIGHT AFT 1,2,L,R:
- replace the related WORK LIGHT AMM 33-27-12-000-001 and AMM 33-27-12-400-001.
- replace the related PWR UNIT AMM 33-27-38-000-001 and AMM 33-27-38-400-001.
B. If the operational test gives the maintenance message WORK LIGHT PCB FWD 1,2,L,R
or WORK LIGHT PCB MID 1,2,L,R or WORK LIGHT PCB AFT 1,2,L,R:
Subtask 33-27-00-810-058-A ** ON A/C NOT FOR ALL or WORK LIGHT PCB MID 1,2,L,R or WORK LIGHT PCB AFT 1,2,L,R:
- replace the related WORK LIGHT AMM 33-27-12-000-001 and AMM 33-27-12-400-001.
- replace the related PWR UNIT AMM 33-27-38-000-001 and AMM 33-27-38-400-001.
C. If the operational test gives the maintenance message POWER PCB FWD 1,2,L,R
or POWER PCB 1,2,L,R or POWER PCB AFT 1,2,L,R:
Subtask 33-27-00-810-056-B ** ON A/C NOT FOR ALL or POWER PCB 1,2,L,R or POWER PCB AFT 1,2,L,R:
- replace the related PWR UNIT AMM 33-27-38-000-001 and AMM 33-27-38-400-001.
D. If the operational test gives the maintenance message WORK LT <APPL. AREA> ATTXXX:
Subtask 33-27-00-810-057-B ** ON A/C NOT FOR ALL - Replace the related WORK LIGHT AMM 33-27-12-000-001 and AMM 33-27-12-400-001.
- Replace the related STA PISA [203LZ] and/or STA PISA [212LZ] AMM 33-27-41-000-001 and AMM 33-27-41-400-001.
E. If the operational test gives the maintenance message WORK LT PCB <APPL. AREA> ATTXXX or WORK LT PCB <APPL. AREA> ATTXXX / DEU A (200RHXX):
Subtask 33-27-00-810-058-B ** ON A/C NOT FOR ALL - Replace the related WORK LIGHT AMM 33-27-12-000-001 and AMM 33-27-12-400-001.
- Replace the related STA PISA [203LZ] and/or STA PISA [212LZ] AMM 33-27-41-000-001 and AMM 33-27-41-400-001.
F. If the operational test gives the maintenance message PISA (602RH) - WORK LT <APPL. AREA> ATTNXX or PISA (602RH) / WORK LT <APPL. AREA> ATTNXX:
Subtask 33-27-00-810-050-A - Replace the related STA PISA [203LZ] and/or STA PISA [212LZ] AMM 33-27-41-000-001 and AMM 33-27-41-400-001.
G. If the test gives a different maintenance message, do the trouble shooting procedure related to the maintenance message.
Subtask 33-27-00-810-051-A ** ON A/C NOT FOR ALL H. If the operational test gives no maintenance message, but one of the work lights does not come on:
Subtask 33-27-00-810-054-A ** ON A/C NOT FOR ALL - replace the related lamp AMM 33-27-12-000-001 and AMM 33-27-12-400-001.
- do a check of the related PUSHBUTTON SWITCH and replace it if necessary.
- replace the related PWR UNIT AMM 33-27-38-000-001 and AMM 33-27-38-400-001.
- do a check and repair the wiring between:
PWR UNIT (3LZ) conn. A/D and L FWD ATTND SEAT (2063VU1) pin 1,
PWR UNIT (3LZ) conn. A/G and L FWD ATTND SEAT (2063VU1) pin 3,
GND and L FWD ATTND SEAT (2063VU1) pin 2,
PWR UNIT (13LZ) conn. A/F and R AFT ATTND SEAT (2062VU2) pin 1,
GND and R AFT ATTND SEAT (2062VU2) pin 2,
PWR UNIT (12LZ) conn. A/F and L AFT ATTND SEAT (2062VU1) pin 1,
GND and L AFT ATTND SEAT (2062VU1) pin 2 ASM 332701.
I. If the operational test gives no maintenance message, but the work light does not come on when you push the pushbutton switch:
Subtask 33-27-00-810-051-B ** ON A/C NOT FOR ALL - replace the related lamp AMM 33-27-12-000-001 and AMM 33-27-12-400-001.
- do a check of the related PUSHBUTTON SWITCH and replace it if necessary ASM 332701.
- replace the related PWR UNIT AMM 33-27-38-000-001 and AMM 33-27-38-400-001.
- do a check and repair the wiring between:
PWR UNIT (3LZ) conn. A/D and L FWD ATTND SEAT (2063VU1) pin 1,
PWR UNIT (3LZ) conn. A/G and L FWD ATTND SEAT (2063VU1) pin 3,
GND and L FWD ATTND SEAT (2063VU1) pin 2,
PWR UNIT (13LZ) conn. A/F and R AFT ATTND SEAT (2062VU2) pin 1,
GND and R AFT ATTND SEAT (2062VU2) pin 2,
PWR UNIT (12LZ) conn. A/F and L AFT ATTND SEAT (2062VU1) pin 1,
GND and L AFT ATTND SEAT (2062VU1) pin 2 ASM 332701.
J. If the operational test gives no maintenance message and one of the work lights does not come on:
Subtask 33-27-00-810-054-B ** ON A/C NOT FOR ALL - replace the related WORK LIGHT AMM 33-27-12-000-001 and AMM 33-27-12-400-001.
- do a check of the related PUSHBUTTON SWITCH and replace it if necessary.
- replace the related STA PISA [203LZ] and/or STA PISA [212LZ] AMM 33-27-41-000-001 and AMM 33-27-41-400-001.
- do a check and repair the wiring between:
STA PISA [203LZ] conn. 6 and L FWD ATTND SEAT (2063VU1) pin 1,
STA PISA [203LZ] conn. 8 and K FWD ATTND SEAT (2063VU1) pin 3,
STA PISA [203LZ] conn. 37 and M FWD ATTND SEAT (2063VU1) pin 2,
STA PISA [212LZ] conn. 6 and AFT ATTND SEAT (2062VU1) pin 1,
STA PISA [212LZ] conn. 36 and AFT ATTND SEAT (2062VU1) pin 2,
STA PISA [212LZ] conn. 24 and AFT ATTND SEAT (2062VU3) pin 1,
STA PISA [212LZ] conn. 17 and AFT ATTND SEAT (2062VU3) pin 2,
STA PISA [212LZ] conn. 18 and L AFT ATTND SEAT (2062VU2) pin 1,
STA PISA [212LZ] conn. 25 and M AFT ATTND SEAT (2062VU2) pin 2 ASM 332701.
K. If the operational test gives no maintenance message and the work light does not come on when you push the pushbutton switch:
Subtask 33-27-00-810-051-E ** ON A/C NOT FOR ALL - replace the related WORK LIGHT AMM 33-27-12-000-001 and AMM 33-27-12-400-001.
- do a check of the related PUSHBUTTON SWITCH and replace it if necessary ASM 332701.
- replace the related STA PISA [203LZ] and/or STA PISA [212LZ] AMM 33-27-41-000-001 and AMM 33-27-41-400-001.
- do a check and repair the wiring between:
STA PISA [203LZ] conn. 6 and L FWD ATTND SEAT (2063VU1) pin 1,
STA PISA [203LZ] conn. 8 and K FWD ATTND SEAT (2063VU1) pin 3,
STA PISA [203LZ] conn. 37 and M FWD ATTND SEAT (2063VU1) pin 2,
STA PISA [212LZ] conn. 6 and AFT ATTND SEAT (2062VU1) pin 1,
STA PISA [212LZ] conn. 36 and AFT ATTND SEAT (2062VU1) pin 2,
STA PISA [212LZ] conn. 24 and AFT ATTND SEAT (2062VU3) pin 1,
STA PISA [212LZ] conn. 17 and AFT ATTND SEAT (2062VU3) pin 2,
STA PISA [212LZ] conn. 18 and L AFT ATTND SEAT (2062VU2) pin 1,
STA PISA [212LZ] conn. 25 and M AFT ATTND SEAT (2062VU2) pin 2 ASM 332701.
L. If the operational test gives no maintenance message and one of the work lights does not come on:
Subtask 33-27-00-810-054-E ** ON A/C NOT FOR ALL - Replace the related WORK LIGHT AMM 33-27-12-000-001 and AMM 33-27-12-400-001.
- Do a check of the related
SWITCH PANEL (2062VU) and/orSWITCH PANEL (2063VU) and replace if necessary ASM 332701.
- Replace the related STA PISA [203LZ] and/or STA PISA [212LZ] AMM 33-27-41-000-001 and AMM 33-27-41-400-001.
- Do a check and repair the wiring between:
STA PISA [203LZ] connector J2 pin 34 and the switch panel (2063VU1) of the forward attendant seats pin 1,
STA PISA [203LZ] connector J2 pin 35 and the switch panel (2063VU1) of the forward attendant seats pin 3,
STA PISA [203LZ] connector J2 pin 19 and the switch panel (2063VU1) of the forward attendant seats pin 2,
STA PISA [212LZ] connector J2 pin 34 and the switch panel (2062VU1) of the aft attendant seats pin 1,
STA PISA [212LZ] connector J2 pin 18 and the switch panel (2062VU1) of the aft attendant seats pin 2,
STA PISA [212LZ] connector J2 pin 36 and the switch panel (2063VU2) of the aft attendant seats pin 1,
STA PISA [212LZ] connector J2 pin 35 and the switch panel (2063VU2) of the aft attendant seats pin 3,
STA PISA [212LZ] connector J2 pin 20 and the switch panel (2063VU2) of the aft attendant seats pin 2,
STA PISA [212LZ] connector J2 pin 37 and the switch panel (2062VU2) of the aft attendant seats pin 1,
STA PISA [212LZ] connector J2 pin 21 and the switch panel (2062VU2) of the aft attendant seats pin 2 ASM 332701.
M. If the operational test gives no maintenance message and the work light does not come on when you push the pushbutton switch:
Subtask 33-27-00-810-051-Z ** ON A/C NOT FOR ALL - Replace the related WORK LIGHT AMM 33-27-12-000-001 and AMM 33-27-12-400-001.
- Do a check of the related
SWITCH PANEL (2062VU) and/orSWITCH PANEL (2063VU) and replace if necessary ASM 332701.
- Replace the related STA PISA [203LZ] and/or STA PISA [212LZ] AMM 33-27-41-000-001 and AMM 33-27-41-400-001.
- Do a check and repair the wiring between:
STA PISA [203LZ] connector J2 pin 34 and the switch panel (2063VU1) of the forward attendant seats pin 1,
STA PISA [203LZ] connector J2 pin 35 and the switch panel (2063VU1) of the forward attendant seats pin 3,
STA PISA [203LZ] connector J2 pin 19 and the switch panel (2063VU1) of the forward attendant seats pin 2,
STA PISA [212LZ] connector J2 pin 34 and the switch panel (2062VU1) of the aft attendant seats pin 1,
STA PISA [212LZ] connector J2 pin 18 and the switch panel (2062VU1) of the aft attendant seats pin 2,
STA PISA [212LZ] connector J2 pin 36 and the switch panel (2063VU2) of the aft attendant seats pin 1,
STA PISA [212LZ] connector J2 pin 35 and the switch panel (2063VU2) of the aft attendant seats pin 3,
STA PISA [212LZ] connector J2 pin 20 and the switch panel (2063VU2) of the aft attendant seats pin 2,
STA PISA [212LZ] connector J2 pin 37 and the switch panel (2062VU2) of the aft attendant seats pin 1,
STA PISA [212LZ] connector J2 pin 21 and the switch panel (2062VU2) of the aft attendant seats pin 2 ASM 332701.
N. If the operational test gives no maintenance message and one of the work lights does not come on:
Subtask 33-27-00-810-054-Z ** ON A/C NOT FOR ALL - Replace the related WORK LIGHT AMM 33-27-12-000-001 and AMM 33-27-12-400-001.
- Do a check of the related
SWITCH PANEL (2062VU) and/orSWITCH PANEL (2063VU) and replace it if necessary ASM 332701.
- Replace the related STA PISA [203LZ] and/or STA PISA [212LZ] AMM 33-27-41-000-001 and AMM 33-27-41-400-001.
- Do a check and repair the wiring between:
STA PISA [203LZ] connector J2 pin 34 and the switch panel (2063VU1) of the forward attendant seats pin 1,
STA PISA [203LZ] connector J2 pin 35 and the switch panel (2063VU1) of the forward attendant seats pin 3,
STA PISA [203LZ] connector J2 pin 19 and the switch panel (2063VU1) of the forward attendant seats pin 2,
STA PISA [212LZ] connector J2 pin 35 and the switch panel (2063VU3) of the aft attendant seats pin 1,
STA PISA [212LZ] connector J2 pin 34 and the switch panel (2063VU3) of the aft attendant seats pin 3,
STA PISA [212LZ] connector J2 pin 18 and the switch panel (2063VU3) of the aft attendant seats pin 2,
STA PISA [212LZ] connector J2 pin 37 and the switch panel (2062VU2) of the aft attendant seats pin 1,
STA PISA [212LZ] connector J2 pin 21 and the switch panel (2062VU2) of the aft attendant seats pin 2 ASM 332701.
O. If the operational test gives no maintenance message and the work light does not come on when you push the pushbutton switch:
Subtask 33-27-00-810-055-A ** ON A/C NOT FOR ALL - Replace the related WORK LIGHT AMM 33-27-12-000-001 and AMM 33-27-12-400-001.
- Do a check of the related
SWITCH PANEL (2062VU) and/orSWITCH PANEL (2063VU) and replace it if necessary ASM 332701.
- Replace the related STA PISA [203LZ] and/or STA PISA [212LZ] AMM 33-27-41-000-001 and AMM 33-27-41-400-001.
- Do a check and repair the wiring between:
STA PISA [203LZ] connector J2 pin 34 and the switch panel (2063VU1) of the forward attendant seats pin 1,
STA PISA [203LZ] connector J2 pin 35 and the switch panel (2063VU1) of the forward attendant seats pin 3,
STA PISA [203LZ] connector J2 pin 19 and the switch panel (2063VU1) of the forward attendant seats pin 2,
STA PISA [212LZ] connector J2 pin 35 and the switch panel (2063VU3) of the aft attendant seats pin 1,
STA PISA [212LZ] connector J2 pin 34 and the switch panel (2063VU3) of the aft attendant seats pin 3,
STA PISA [212LZ] connector J2 pin 18 and the switch panel (2063VU3) of the aft attendant seats pin 2,
STA PISA [212LZ] connector J2 pin 37 and the switch panel (2062VU2) of the aft attendant seats pin 1,
STA PISA [212LZ] connector J2 pin 21 and the switch panel (2062VU2) of the aft attendant seats pin 2 ASM 332701.
P. If the test gives no maintenance message, but no work lights come on:
Subtask 33-27-00-710-052-A - do a check of the FAP [120RH] and replace it if necessary AMM 23-73-15-000-001 and AMM 23-73-15-400-001.
- do a check of the RELAY-SYS PWR SPLY [2LZ] and replace it if necessary.
- do a check and repair the wiring between:
PWR UNIT (12LZ) conn. A/A and RELAY (2LZ) conn. A/B1,
PWR UNIT (13LZ) conn. A/A and RELAY (2LZ) conn. A/B1,
PWR UNIT (3LZ) conn. A/A and RELAY (2LZ) conn. A/B1,
FAP (120RH) conn. A/13 and RELAY (2LZ) conn. A/X1,
CB (1LZ) and RELAY (2LZ) conn. A/B2,
GND and RELAY (2LZ) conn. A/X2 ASM 332701.
Q. Do the test as given in the Para. 3.A.
5. Close-upSubtask 33-27-00-860-050-A
A. Put the aircraft back to its initial configuration.