Right Flap Interconnecting-Strut Attachment Failure-Detection Sensor Fault

TASK 27-51-00-810-821-A
Right Flap Interconnecting-Strut Attachment Failure-Detection Sensor Fault

NOTE: If a fault occurs on the two proximity sensors 38CV and 40CV, a F/CTL FLAPS Fault E/W is shown on the top of the SFCS maintenance status when flaps are in conf 1, 2 or 3.

1. Possible Causes

SLAT/FLAP CONTR.COMP. [21CV]
SLAT/FLAP CONTR.COMP. [22CV]
SENSOR-R FLAP ATTACHMENT FAILURE DETECTION [38CV]
SENSOR-R FLAP ATTACHMENT FAILURE DETECTION [40CV]
aircraft wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 32-31-00-810-829-A	Right Flap Disconnect Proximity Sensor
AMM 27-51-00-710-002	Operational Test of the Flap Interconnecting Strut and the Flap-Attachment Failure-Detection Sensors
ASM 275106
ASM 275107
AMM 27-51-15-000-002	Removal of the Proximity-Sensors of the Interconnecting Strut
AMM 27-51-15-400-002	Installation of the Proximity-Sensors of the Interconnecting Strut
AMM 27-51-34-000-001	Removal of the SFCC
AMM 27-51-34-400-001	Installation of the SFCC
AMM 32-69-00-740-001	BITE Check of Landing-Gear Control Interface-Unit (LGCIU) With Use of MCDU to Ensure that Continuous BITE is Operative

3. Fault Confirmation
Subtask 27-51-00-740-056-A

A. Test
(1) Do a BITE test with the LGCIU given in the CFDS message AMM 32-69-00-740-001.
(2) If the test gives a message that includes the DISC PROX SENSOR (38CV or 40CV), do the fault isolation procedure in (Ref. TSM TASK 32-31-00-810-829).
(3) If the test does not give a message that includes the DISC PROX SENSOR (38CV or 40CV), but the fault continues, do the fault isolation procedure in Para. 4.

4. Fault Isolation
Subtask 27-51-00-810-066-A

A. Procedure
(1) Interchange the SFCCs, AMM 27-51-34-000-001 and AMM 27-51-34-400-001.

NOTE: This will cause each SFCC to get a new identification.

(2) Do an operational test of the flap interconnecting strut AMM 27-51-00-710-002.
(3) If the test is OK:
(a) Replace the SLAT/FLAP CONTR.COMP. [21CV] or SLAT/FLAP CONTR.COMP. [22CV] that was the source of the initial CFDS message.
(b) Install the serviceable SFCC in its initial position.
(4) If the test is not OK (gives the same CFDS message as the initial CFDS message):
(a) Install the SFCCs in their initial positions.
(b) Replace the applicable proximity sensor SENSOR-R FLAP ATTACHMENT FAILURE DETECTION [38CV] or SENSOR-R FLAP ATTACHMENT FAILURE DETECTION [40CV] , AMM 27-51-15-000-002 and AMM 27-51-15-400-002.
(5) If the fault continues, do a check and repair as necessary the aircraft wiring between:

the applicable proximity sensor and the related LGCIU, ASM 275106 or ASM 275107
the applicable LGCIU and the related SFCC, ASM 275106 or ASM 275107.

(a) Do the test given in step (2).

[Rev.8 from Aug 2018] 2026.04.04 04:27:38 UTC