3. Job Set-up
__________
Subtask 30-71-51-860-051
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-210, 401-499,
Subtask 30-71-51-865-057
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------
PANEL SERVICE IDENT. LOCATION
-------------------------------------------------------------------------------
2000VU WASTE WATER ICE PROT - DRAINMAST FWD 1DU B06
2001VU WASTE WATER ICE PROT - DRAINMAST AFT 11DU E01
**ON A/C 106-149, 211-299, 301-399,
Subtask 30-71-51-865-057-A
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------
PANEL SERVICE IDENT. LOCATION
-------------------------------------------------------------------------------
2000VU WASTE WIP - DRAINMAST FWD 1DU B06
2001VU WASTE WIP - DRAINMAST AFT 11DU E01
**ON A/C ALL
Subtask 30-71-51-010-053
C. Get Access
(1) Put an access platform in position at the related Drain Mast.
4. Procedure
_________
Subtask 30-71-51-210-050
A. General
**ON A/C 001-049, 051-061, 101-103, 201-203,
(Ref. Fig. 601/TASK 30-71-51-991-003)
R **ON A/C 062-099, 104-149, 151-199, 204-299, 301-399, 401-499,
(Ref. Fig. 601A/TASK 30-71-51-991-003-A)
**ON A/C ALL
The Drain Mast Cover is an aerodynamic cover made out of aluminium. It has a wall thickness of 1.2 mm (0.0472 in.) (without corrosion-paint and laquer).
(1) General requirements.
A serviceable Drain Mast must have:
-
no lateral deformation,
-
no cracks,
-
no scratches and abrasions that have a depth of more than max. 50%
of the cover material thickness 0.6 mm (0.0236 in.). Scratches must be made smooth if the corrosion protection is damaged. The surface protection and paint coating must be repaired after repair of scratches and abraision.
(2) Damage Limits The Drain Mast Cover is divided into 4 Zones with special Zone-Limits:
-
Zone 1: max. dent depth 0.0 mm (0.0000 in.),
-
Zone 2: max. dent depth 3.0 mm (0.1181 in.),
Visual Inspection of Drain Mast (4DU, 14DU and 24DU)
Figure 601/TASK 30-71-51-991-003
R 1EFF : 001-049, 051-061, 101-103, 201-203, 1 30-71-51Page 604 1 1 May 01/05 1 1 1CES 1
Visual Inspection of Drain Mast (4DU, 14DU and 24DU)
Figure 601A/TASK 30-71-51-991-003-A
R 1EFF : 062-099, 104-149, 151-199, 204-299, 1 30-71-51Page 605 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1
-
Zone 3: max. dent depth 0.0 mm (0.0000 in.),
-
Zone 4: max. dent depth 0.0 mm (0.0000 in.).
(3) Visual Inspection of the Drain Mast. Do an visual inspection of the Drain Mast for cracks, scratches, dents, deformation and abrasion. Make sure that the bolts, which connect the Drain Mast to the fuselage, are tight. Do a check of the adjacent area for damage.
(a)
If you find scratches and abrasion with a depth less than 50% of the material thickness, 0.6 mm (0.0236 in.):
-do an Operational Test of the Drain Mast (Ref. TASK 30-71-00-710-001) to make sure that the Drain Mast operates corrctly.
(b)
If you find cracks, scratches, dents, deformation and abrasion which are not within the given limits and Zone-Limits:
1_ If the Operational Test is correct and the corrosion
protection is not damaged:
- no further action is necessary.
2_ If the Operational Test is correct but the corrosion
protection is damaged:
- remove the related Drain Mast (Ref. TASK 30-71-51-000-001)
(Ref. TASK 30-71-51-400-001) for repair at shop (Ref. CMM
383411).
3_ If the Operational test is not correct:
- replace the related Drain Mast (Ref. TASK 30-71-51-000-001)
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