K13332 K13373
550 Cargo Compartment Smoke Detector
May 01/99 Figure 701 (Sheet 1) 26-20-11
Page 703
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Cargo Compartment Smoke Detector Installation 550
26-20-11 Figure 701 (Sheet 2) May 01/99
Page 704
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
CARGO ELECTRONIC UNIT - REMOVAL/INSTALLATION
EFFECTIVITY
737-200 Passenger Airplanes Incorporating SB 26A1081
1. General
A. This procedure has the following tasks:
(1)
Removal of Cargo Electronic Unit (CEU).
(2)
Installation of CEU.
B. A CEU is installed in the ceiling of the FWD and AFT Cargo Compartment.
2. Cargo Electronic Unit Removal (Fig. 401)
A. References
(1) Manual Control - Maintenance Practices (Apply Power)(AMM 24-22-0/201)
B. Access
(1)
Location Zones
(a)
213 Forward Cargo Compartment
(b)
215 Aft Cargo Compartment
(2)
Access Panels
(a)
4404R, Forward Cargo Door
(b)
4504R, Aft Cargo Door
C. Prepare for Removal
(1)
Open the following circuit breakers and install DO-NOT-CLOSE tags:
(a) Circuit breaker panel P6 or P18:
1) CARGO FIRE FWD DET A
2) CARGO FIRE FWD DET B
3) CARGO FIRE AFT DET A
4) CARGO FIRE AFT DET B
(2)
Open applicable (FWD/4404R or AFT/4504R) Cargo Compartment Door.
D. Remove CEU
(1)
Remove screws attaching cover to cargo compartment ceiling.
(2)
Remove screws attaching CEU to ceiling bracket.
(3)
Disconnect electrical connector from CEU.
(4)
Remove CEU.
3. Cargo Electronic Unit Installation (Fig. 401)
A. References
(1) Manual Control - Maintenance Practices (Apply Power)(AMM 24-22-0/201)
B. Access
(1)
Location Zones
(a)
213 Forward Cargo Compartment
(b)
215 Aft Cargo Compartment
(2)
Access Panels
(a)
4404R, Forward Cargo Door
(b)
4504R Aft Cargo Door
(2)
Open applicable (FWD/4404R or AFT/4504R) Cargo Compartment Door.
May 01/99 26-20-12 Page 401
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
K13391 K13395 K13396
Cargo Electronic Unit Installation 550
26-20-12 Figure 401 (Sheet 1) May 01/99
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
550 Cargo Electronic Unit Installation
May 01/99 Figure 401 (Sheet 2) 26-20-12
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Cargo Electronic Unit Installation 550
26-20-12 Figure 401 (Sheet 3) May 01/99
Page 404
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
C. Prepare for Installation
(1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) Circuit breaker panel P6 or P18:
1) CARGO FIRE FWD DET A
2) CARGO FIRE FWD DET B
3) CARGO FIRE AFT DET A
4) CARGO FIRE AFT DET B
D. Install CEU
(1)
Connect electrical connectors to CEU.
(2)
Put CEU into position in ceiling bracket.
(3)
Install screws to hold CEU in place.
E. Perform Installation Test
(1)
Supply electrical power (AMM 24-22-0/201).
(2)
Remove DO-NOT-CLOSE tags and close the following circuit breakers:
(a) Circuit breaker panel P6 or P18:
1) CARGO FIRE FWD DET A
2) CARGO FIRE FWD DET B
3) CARGO FIRE AFT DET A
4) CARGO FIRE AFT DET B
(3)
Test the CEU
(a)
Push and hold LAMP TEST switch on CEU. 1) Ensure all smoke detector indicators (loop A and B) on CEU illuminate.
(b)
Release LAMP TEST switch. 1) Ensure all smoke detector indicators (loop A and B) on CEU go out.
(c)
Push and hold PRESS TO TEST switch on CEU. 1) Ensure all smoke detector indicators (loop A and B) on CEU illuminate.
