Engine 1 Bleed Pressure Sensor Drift Measurement

TASK 36-11-00-810-A14-A
Engine 1 Bleed Pressure Sensor Drift Measurement

1. Possible Causes

XDCR-BLEED REGULATED PRESS, ENG 1 [8HA1]
sense line

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 36-11-00-740-805	Drift Test of the Pressure Sensor
AMM 36-11-16-000-802	Removal of the Bleed Regulated Pressure-Transducer
AMM 36-11-16-400-802	Installation of the Bleed Regulated Pressure-Transducer
AMM 36-11-49-000-823	Removal of the Environmental Control System (ECS) Sense Lines
AMM 36-11-49-000-832	Removal of the Sense Lines of the Bleed Regulated Pressure-Transducer and the Bleed Transferred Pressure-Transducer
AMM 36-11-49-400-823	Installation of the Environmental Control System (ECS) Sense Lines
AMM 36-11-49-400-832	Installation of the Sense Lines of the Bleed Regulated Pressure-Transducer and the Bleed Transferred Pressure-Transducer
AMM 36-12-00-860-802	Pressurization of the Bleed System with the APU
AMM 36-12-00-860-803	Pressurization of the Bleed System through the HP Ground Connector
AMM 36-22-00-790-802	Leak Check on all the Bleed Air Ducts and Packs Components

3. Fault Confirmation
Subtask 36-11-00-740-108-A ** ON A/C NOT FOR ALL

A. Test
(1) Pressurize the Bleed Air System AMM 36-12-00-860-802 or AMM 36-12-00-860-803
(2) Do the Pressure Sensor Drift Test AMM 36-11-00-740-805.

4. Fault Isolation
Subtask 36-11-00-810-439-A ** ON A/C NOT FOR ALL

A. If the test shows the maintenance message:
DRIFT REG-PRESS XDCR (8HA1)/ SENSE LINE
(1) Replace the XDCR-BLEED REGULATED PRESS, ENG 1 [8HA1] AMM 36-11-16-000-802 and AMM 36-11-16-400-802.
(2) Do the test given in Para. 3.

Subtask 36-11-00-810-440-A ** ON A/C NOT FOR ALL

B. If the fault continues:
(1) Replace the sense line of the bleed regulated pressure-transducer AMM 36-11-49-000-823 AMM 36-11-49-400-823 and AMM 36-11-49-000-832 AMM 36-11-49-400-832.
(2) Do a leak check of the sense line AMM 36-22-00-790-802.

Subtask 36-11-00-710-644-A ** ON A/C NOT FOR ALL

C. Test
(1) After the subsequent flight, make sure that the fault does not continue.

[Rev.8 from Aug 2018] 2026.04.04 04:33:55 UTC