Removal of the Temperature Selector
TASK 21-63-11-000-001-A
Removal of the Temperature Selector
1. Reason for the Job
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 21-63-11-865-050-A
Subtask 21-63-11-020-050-A
[Rev.10 from 2021]
2026.04.02 06:11:43 UTC
Removal of the Temperature Selector
1. Reason for the Job
NOTE: The procedure is the same for the temperature selectors 27HK, 28HK and 29HK.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | CAP - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| REFERENCE | DESIGNATION |
|---|---|
Subtask 21-63-11-865-050-A
A. Open, safety and tag this(these) circuit breaker(s):
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/FLOW/CTL &/IND1 | 1HB | D07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR BLEED/ENG 1/CTL | 3HA1 | D12 |
| 49VU | AIR BLEED/ENG 1/MONG | 2HA1 | D11 |
| ** ON A/C ALL | |||
| 49VU | AIR BLEED/X FEED/VALVE/BAT | 2HV | D13 |
| 49VU | AIR COND/RAM/AIR/INLET | 1HZ | D10 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR BLEED/ENG 2/MONG | 3HA2 | D12 |
| 49VU | AIR BLEED/ENG 1/CTL | 2HA1 | D11 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR COND/FLOW/CTL AND IND/2 | 2HB | V21 |
| 122VU | AIR COND/ZONE TEMP CTL/28VDC/SYS2 | 4HK | V20 |
| 122VU | AIR COND/ZONE TEMP CTL/28VDC/SYS1 | 3HK | V19 |
| 122VU | AIR COND/ZONE TEMP CTL/115VAC/SYS2 | 2HK | V18 |
| 122VU | AIR COND/ZONE TEMP CTL/115VAC/SYS1 | 1HK | V17 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR BLEED/ENG 2/CTL | 3HA2 | Z23 |
| 122VU | AIR BLEED/ENG 2/MONG | 2HA2 | Z22 |
| ** ON A/C ALL | |||
| 122VU | AIR BLEED/X FEED VALVE/NORM | 1HV | Z20 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR BLEED/ENG 1/MONG | 3HA1 | Z23 |
| 122VU | AIR BLEED/ENG 2/CTL | 2HA2 | Z22 |
Subtask 21-63-11-020-050-A
A. Remove the temperature selector:
(1) Turn the QAD fasteners (1) one quarter turn.
(2) Pull the air conditioning panel 30VU (2) from its housing. Do not disconnect the electrical connectors from the rear plate (3).
(3) Disconnect the electrical connector (4).
(4) Put a CAP - BLANKING on the electrical connector (4).
(5) Loosen the two screws (11).
(6) Pull the knob (10) from its shaft.
(7) Remove the nut (9).
(8) Remove the washer (8).
(9) Remove the potentiometer (5).
(1) Turn the QAD fasteners (1) one quarter turn.
(2) Pull the air conditioning panel 30VU (2) from its housing. Do not disconnect the electrical connectors from the rear plate (3).
(3) Disconnect the electrical connector (4).
(4) Put a CAP - BLANKING on the electrical connector (4).
(5) Loosen the two screws (11).
(6) Pull the knob (10) from its shaft.
(7) Remove the nut (9).
(8) Remove the washer (8).
(9) Remove the potentiometer (5).
Temperature Selector