Standby Airspeed Information not Accurate

TASK 34-21-00-810-802-A
Standby Airspeed Information not Accurate

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-10-00-170-003	Draining and Flushing of Standby Pneumatic Circuits
AMM 34-21-00-720-001	Functional Test of the Standby Airspeed Indicator
AMM 34-21-26-000-001	Removal of the Standby Airspeed Indicator
AMM 34-21-26-400-001	Installation of the Standby Airspeed Indicator

3. Fault Confirmation
Subtask 34-21-00-720-050-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the functional test of the standby airspeed indicator AMM 34-21-00-720-001.

4. Fault Isolation
Subtask 34-21-00-810-051-A ** ON A/C NOT FOR ALL

A. If the standby airspeed indicator shows out of tolerance values:

(1) If the fault continues:

drain and flush the standby static and the standby total pressure lines AMM 34-10-00-170-003.

Subtask 34-21-00-720-051-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:32:55 UTC