Visual Inspection of the Stage 1 Booster Vane Assembly (PRE SB 72-00-0080) [CFML]

TASK 72-21-00-210-803-A
Visual Inspection of the Stage 1 Booster Vane Assembly (PRE SB 72-00-0080)

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

ZONE: 400

1. Reason for the Job
This procedure gives the criteria for the visual inspection of the Low Pressure Compressor (LPC) Stage 1 vane.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	MAT - PROTECTIVE
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 72-21-00-300-803-A	Blend Repair of Stage-1 Booster-Vane Assembly (PRE SB 72-0080)
TASK 72-21-20-000-801-A	Removal of the Fan Blades
TASK 72-21-20-400-801-A	Installation of the Fan Blades
Stage 1 Booster Vane Assembly (PRE SB 72-00-0080)

3. Job Set-up
Subtask 72-21-00-941-094-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch, and
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 72-21-00-010-068-A

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Remove the fan blades (Ref. AMM TASK 72-21-20-000-801).
(3) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
(4) Install the MAT - PROTECTIVE.

4. Procedure
Subtask 72-21-00-210-066-A

A. Visual Inspection of the Stage 1 Booster Vane Assembly

Table: Visual Inspection of the Stage 1 Booster Vane Assembly

Inspect/ Check	Maximum Serviceable Limits	Remarks	Maximum Repairable Limits	Repair Method
1.Missing pieces on the Stage 1 booster vane (1) assembly	Not serviceable.
2.Broken vane on the Stage 1 booster vane (1) assembly	Not serviceable.
3.Cracks and tears in all Areas of the Stage 1 booster vane (1) assembly	Not serviceable.
4.Scratches in Areas A Leading Edge (LE), A and A Trailing Edge (TE) of the Stage 1 booster vane (1) assembly	Not serviceable.
5.Scratches in Areas B LE of the Stage 1 booster vane (1) assembly	Any number, if not more than 0.0020 in. (0.05 mm) in depth.	No intersection permitted.	Up to six airfoils repairable, if in the repairable limits.	Refer to (Ref. AMM TASK 72-21-00-300-803).
6.Scratches in Areas B TE of the Stage 1 booster vane (1) assembly	Any number, if not more than 0.0020 in. (0.05 mm) in depth.	No intersection permitted.
7.Scratches in Areas C of the Stage 1 booster vane (1) assembly	Any number, if not more than 0.0020 in. (0.05 mm) in depth.	No intersection permitted.
8.Nicks and dents in Area A on the LE of the Stage 1 booster vane (1) assembly	Any number, if not more than 0.0039 in. (0.10 mm) in depth axially.	Protrusion is acceptable, if not through.
9.Nicks and dents in Area A of the Stage 1 booster vane (1) assembly	Any number, if not more than 0.0236 in. (0.60 mm) diameter circle.	Protrusion is acceptable, if not through.
10.Nicks and dents in Area A on the TE of the Stage 1 booster vane (1) assembly	Any number, if not more than 0.008 in. (0.20 mm) diameter circle.	Protrusion is acceptable, if not through.
11.Nicks and dents in Area B on the LE of the Stage 1 booster vane (1) assembly	Any number, if not more than 0.0098 in. (0.25 mm) in depth axially.	Protrusion is acceptable, if not through.	Up to six airfoils repairable, if in the repairable limits.	Refer to (Ref. AMM TASK 72-21-00-300-803).
12.Nicks and dents in Area B on the TE of the Stage 1 booster vane (1) assembly	Any number, if not more than 0.0157 in. (0.40 mm) in depth axially.	Protrusion is acceptable, if not through.
13.Nicks and dents in Area C of the Stage 1 booster vane (1) assembly	Any number, if not more than 0.0236 in. (0.60 mm) diameter circle.	Protrusion is acceptable, if not through.
14.Vane looseness on the Stage 1 booster vane (1) assembly	Not serviceable.
15.Local distortion in Area C of the Stage 1 booster vane (1) assembly	Not serviceable.
16.Local distortion on the LE and TE of the Stage 1 booster vane (1) assembly	Any number, if outside Area D and if Length L along the leading (or trailing) edge is not more than 0.295 in. (7.49 mm) and the maximum dimension X along the circumferential direction is not more than 0.0295 in. (0.75 mm).
17.Deposit on the Stage 1 booster vane (1) assembly	Any amount.
18.Erosion in Areas B of the Stage 1 booster vane (1) assembly	Any amount.

5. Close-up
Subtask 72-21-00-410-070-A

A. Close Access
(1) Install the fan blades (Ref. AMM TASK 72-21-20-400-801).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(4) Remove the MAT - PROTECTIVE.
(5) Remove the access platform(s).
(6) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:51:16 UTC