27-88-00
ALL ú ú 02 Page 107 ú Jul 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
K33610
A 737-300/400/500MAINTENANCE MANUAL
TROUBLE PROBABLE CAUSE ISOLATION PROCEDURE REMEDY
LE FLAPS TRANSIT annunciator shows LE FLAPS EXTEND center panel light does not come on when leading edge LE FLAPS EXTEND center panel light on when leading edge surfaces are light not on center panel indication. correct overhead extended; surfaces are not extended module light and M229 connector between wiring or Burned out lamps or failed light assembly Failure in M229 module Short circuit to ground between lamp and M229 module Open circuit in Failure in M229 module to ground. module for short circuit between light and M229 wiring and connectors If light remains on, check the P6-2 panel. circuit breaker, C22, on Open LE FLAP POSN IND-DC Press light assembly. If light assembly does not If light still does not come on, come on, card A22. Replace lamps. assembly. card A22. necessary. circuit. wiring as Replace light Replace M229 module. Refer to OHM 27-56-40 for test and repair. Suspect circuit Repair or replace Check wiring and connectors between light and M229 module for open Replace M229 module. Refer to OHM 27-56-40 for test and repair. Suspect circuit
Troubleshooting Chart
Figure 101 (Sheet 7)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-88-00
ALL ú ú 02 Page 108 ú Jul 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
K33612
A 737-300/400/500MAINTENANCE MANUAL
TROUBLE PROBABLE CAUSE ISOLATION PROCEDURE REMEDY
surfaces are in-transit LE FLAPS TRANSIT center panel light does not come on when leading edge position abnormal, at any Center panel indication normal; overhead panel indication leading edge Burned out lamps M229 module light and the connector between wiring or Open circuit in annunciator or Open circuit in wiring overhead signal False autoslat assembly module Failure in M229 or failed light If light still does not come on, Landing Gear Logic Shelf; S1 and S3, on the E11 pressing test switches, If any light does not come overhead annunciator panel. Press TEST button on on, If light still does not come on, do a continuity check from removed, If continuity exists with both M1222 and M1223 If continuity exists, D728B, pin 56 to ground. M229 module, connector Simulate AIR mode by Press light assembly. If light does not come on, necessary. Repair as M229 module. annunciator and Check for open circuit between overhead connectors between module. Refer to ground and repair necessary. Replace lamp or panel as test and repair. card A22, A34; relay K1. Suspect circuit OHM 27-56-40 for as necessary. Check wiring and connectors for short circuit to Computers, M1222 isolate fault. and M1223, to remove Autoslat Individually as necessary. circuit. Repair module for open light and M229 Replace M229 assembly. Replace lamps. Check wiring and Replace light
Troubleshooting Chart
Figure 101 (Sheet 8)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-88-00
ALL ú ú 04 Page 109 ú Jul 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
K33618
A 737-300/400/500MAINTENANCE MANUAL
TROUBLE PROBABLE CAUSE ISOLATION PROCEDURE REMEDY
abnormal, at any Center panel indication normal; overhead panel indication leading edge position (Cont) overhead wiring annunciator or Short circuit in Failure in leading edge flap position takeoff warning circuit Failure in M229 module P6-2 panel. If any and/or 4, is abnormal, remains on, overhead annunciator light circuit breaker, C211, on Open LE FLAP POSN IND-DC If any overhead light still remains on, If overhead annunciator indication for flaps 1 annunciator. overhead indicated on edge surface cards for leading Suspect circuit test and repair. OHM 27-56-40 for AMM 31-26-00/501. annunciator panel. as given in takeoff warning edge position Check leading the M229 module. module. Refer to Replace M229 between the Replace the necessary. Repair as annunciator and Check for a short circuit to ground
Troubleshooting Chart
Figure 101 (Sheet 9)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 6(143)
