Failure of the IGGS Pressure Sensor 5YA

TASK 47-11-00-810-805-A
Failure of the IGGS Pressure Sensor 5YA

1. Possible Causes

SENSOR-PRESS MONITORING, IGGS & ASM [5YA]
wiring from IGGS CTL UNIT (1YA) pin A/16 to IGGS PRESS SNSR (5YA) pin A/1
wiring from IGGS CTL UNIT (1YA) pin A/47 to IGGS PRESS SNSR (5YA) pin A/3
wiring from IGGS CTL UNIT (1YA) pin A/58 to IGGS PRESS SNSR (5YA) pin A/4
wiring from ground to IGGS PRESS SNSR (5YA) pin A/2

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 471101
AMM 47-31-34-740-001	BITE Test of the IGGS with Bleed Air
AMM 47-41-13-000-001	Removal of the Pressure Sensor
AMM 47-41-13-400-001	Installation of the Pressure Sensor

3. Fault Confirmation
Subtask 47-11-00-740-058-A ** ON A/C NOT FOR ALL

A. Do the BITE test of the IGGS without bleed air AMM 47-31-34-740-001.

4. Fault Isolation
Subtask 47-11-00-810-054-A ** ON A/C NOT FOR ALL

A. Procedure
(1) Replace the SENSOR-PRESS MONITORING, IGGS & ASM [5YA] AMM 47-41-13-000-001 and AMM 47-41-13-400-001.
(2) Do the BITE test of the IGGS with bleed air AMM 47-31-34-740-001.
(3) If the fault continues:
(a) Do a check and repair the:

wiring from IGGS CTL UNIT (1YA) pin A/16 to IGGS PRESS SNSR (5YA) pin A/1
wiring from IGGS CTL UNIT (1YA) pin A/47 to IGGS PRESS SNSR (5YA) pin A/3
wiring from IGGS CTL UNIT (1YA) pin A/58 to IGGS PRESS SNSR (5YA) pin A/4
wiring from ground to IGGS PRESS SNSR (5YA) pin A/2 ASM 471101.

Subtask 47-11-00-740-059-A ** ON A/C NOT FOR ALL

B. Do the BITE test of the IGGS with bleed air AMM 47-31-34-740-001.

NOTE: After the subsequent flight make sure that the fault does not continue.

[Rev.8 from Aug 2018] 2026.04.04 04:34:22 UTC