Inspection of the Oil, Hydraulic, Fuel and Water Drain Tubes [CFMI]

TASK 71-73-49-210-040-A
Inspection of the Oil, Hydraulic, Fuel and Water Drain Tubes

1. Reason for the Job
To check that the drain tubes are not worn or damaged and attached correctly.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-73-49-000-001-A	Removal of the Reservoir To Manifold Oil Drain Tube
TASK 71-73-49-000-002-A	Removal of the Reservoir To Manifold Pressurized Air Drain Tube
TASK 71-73-49-000-003-A	Removal of the Starter Pad Oil Drain Tube
TASK 71-73-49-000-004-A	Removal of the IDG Oil Drain Tube
TASK 71-73-49-000-005-A	Removal of the Turbine Rear Frame (TRF) Drain Tube
TASK 71-73-49-000-040-A	Removal of the Oil Tank Drain Tube and Hose
TASK 71-73-49-000-041-A	Removal of the Fan Case Drain Tube
TASK 71-73-49-000-042-A	Removal of the Fuel Pump Drain Tubes
TASK 71-73-49-000-043-A	Removal of the Fuel Servos Drain Tubes
TASK 71-73-49-000-044-A	Removal of the Fuel Overboard Drain Tube
TASK 71-73-49-000-045-A	Removal of the Heat Exchanger Drain Tube
TASK 71-73-49-000-046-A	Removal of the Hydro Mechanical Unit (HMU) Drain Tube
TASK 71-73-49-000-047-A	Removal of the Hydraulic Pump Drain Tube
TASK 71-73-49-000-048-A	Removal of the Forward Oil Sump Drain Tube
TASK 71-73-49-000-049-A	Removal of the Reservoir To Manifold Hydraulic Oil Drain Tube
TASK 71-73-49-400-001-A	Installation of the Reservoir To Manifold Oil Drain Tube
TASK 71-73-49-400-002-A	Installation of the Reservoir To Manifold Pressurized Air Drain Tube
TASK 71-73-49-400-003-A	Installation of the Starter Pad Oil Drain Tube
TASK 71-73-49-400-004-A	Installation of the IDG Oil Drain Tube
TASK 71-73-49-400-005-A	Installation of the Turbine Rear Frame (TRF) Drain Tube
TASK 71-73-49-400-040-A	Installation of the Oil Tank Drain Tube and Hose
TASK 71-73-49-400-041-A	Installation of the Fan Case Drain Tube
TASK 71-73-49-400-042-A	Installation of the Fuel Pump Drain Tubes
TASK 71-73-49-400-043-A	Installation of the Fuel Servos Drain Tubes
TASK 71-73-49-400-044-A	Installation of the Fuel Overboard Drain Tube
TASK 71-73-49-400-045-A	Installation of the Heat Exchanger Drain Tube
TASK 71-73-49-400-046-A	Installation of the Hydro Mechanical Unit (HMU) Drain Tube
TASK 71-73-49-400-047-A	Installation of the Hydraulic Pump Drain Tube
TASK 71-73-49-400-048-A	Installation of the Forward Oil Sump Drain Tube
TASK 71-73-49-400-049-A	Installation of the Reservoir To Manifold Hydraulic Oil Drain Tube
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
CMM 710017	(for corrective action)
Oil, Hydraulic, Fuel and Water Drain Tubes
Oil, Hydraulic, Fuel and Water Drain Tubes

3. Job Set-up
Subtask 71-73-49-941-070-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 71-73-49-010-087-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(4) Put the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 71-73-49-040-056-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 71-73-49-010-103-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 71-73-49-020-078-A ** ON A/C NOT FOR ALL

E. Remove Oil, Hydraulic, Fuel and Water Drain Tubes.

4. Procedure
Subtask 71-73-49-210-052-A ** ON A/C NOT FOR ALL

A. Detailed Visual Inspection of the Oil, Hydraulic, Fuel and Water Drain Tubes and Hose
(1) Do a visual inspection of the oil, hydraulic, fuel and water drain tubes and hose as follows:

Oil, Hydraulic, Fuel and Water Drain Tubes ** ON A/C NOT FOR ALL

NOTE: Oil, hydraulic, fuel and water drain tubes and hoses that are removed due to damage may be sent to the shop for repair, review and possible return to service CMM 710017.

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Examine the oil, hydraulic, fuel and water drain tubes and hose, look for:
A.Cracks, splits, kinks	Length must not be more than 2 times the outside diameter of the tube.	If damage is less than the allowable limits, repair the tube at next 750 Flight Hours / 750 Flight Cycles / 4 calendar months (whichever the earliest). If the damage is more than the allowable limits, replace the tube (Ref. AMM TASK 71-73-49-000-040), (Ref. AMM TASK 71-73-49-400-040), (Ref. AMM TASK 71-73-49-000-041), (Ref. AMM TASK 71-73-49-400-041), (Ref. AMM TASK 71-73-49-000-042), (Ref. AMM TASK 71-73-49-400-042), (Ref. AMM TASK 71-73-49-000-043), (Ref. AMM TASK 71-73-49-400-043), (Ref. AMM TASK 71-73-49-000-044), (Ref. AMM TASK 71-73-49-400-044), (Ref. AMM TASK 71-73-49-000-045), (Ref. AMM TASK 71-73-49-400-045).
		and (Ref. AMM TASK 71-73-49-000-046), (Ref. AMM TASK 71-73-49-400-046), (Ref. AMM TASK 71-73-49-000-047), (Ref. AMM TASK 71-73-49-400-047), (Ref. AMM TASK 71-73-49-000-048), (Ref. AMM TASK 71-73-49-400-048), (Ref. AMM TASK 71-73-49-000-049), (Ref. AMM TASK 71-73-49-400-049), (Ref. AMM TASK 71-73-49-000-001),
		and (Ref. AMM TASK 71-73-49-400-001), (Ref. AMM TASK 71-73-49-000-002), (Ref. AMM TASK 71-73-49-400-002), (Ref. AMM TASK 71-73-49-000-003), (Ref. AMM TASK 71-73-49-400-003), (Ref. AMM TASK 71-73-49-000-004), (Ref. AMM TASK 71-73-49-400-004), (Ref. AMM TASK 71-73-49-000-005), (Ref. AMM TASK 71-73-49-400-005),
B.Dents	Maximum depth must be less than 20 percent of the tube outside diameter. Maximum radius is not less than 2 times the wall thickness of the tube. Maximum of 6 dents for each 1 foot (305 mm) length of tube.	If the dent is less than the allowable limits, then repair the dent at next 750 Flight Hours / 750 Flight Cycles / 4 calendar months (whichever the earliest). If the dent is more than the allowable limits, replace the tube (Ref. AMM TASK 71-73-49-000-040), (Ref. AMM TASK 71-73-49-400-040), (Ref. AMM TASK 71-73-49-000-041), (Ref. AMM TASK 71-73-49-400-041), (Ref. AMM TASK 71-73-49-000-042), (Ref. AMM TASK 71-73-49-400-042), (Ref. AMM TASK 71-73-49-000-043), (Ref. AMM TASK 71-73-49-400-043), (Ref. AMM TASK 71-73-49-000-044), (Ref. AMM TASK 71-73-49-400-044), (Ref. AMM TASK 71-73-49-000-045).
		and (Ref. AMM TASK 71-73-49-400-045), (Ref. AMM TASK 71-73-49-000-046), (Ref. AMM TASK 71-73-49-400-046), (Ref. AMM TASK 71-73-49-000-047), (Ref. AMM TASK 71-73-49-400-047), (Ref. AMM TASK 71-73-49-000-048), (Ref. AMM TASK 71-73-49-400-048), (Ref. AMM TASK 71-73-49-000-049), (Ref. AMM TASK 71-73-49-400-049),
		and (Ref. AMM TASK 71-73-49-000-001), (Ref. AMM TASK 71-73-49-400-001), (Ref. AMM TASK 71-73-49-000-002), (Ref. AMM TASK 71-73-49-400-002), (Ref. AMM TASK 71-73-49-000-003), (Ref. AMM TASK 71-73-49-400-003), (Ref. AMM TASK 71-73-49-000-004), (Ref. AMM TASK 71-73-49-400-004), (Ref. AMM TASK 71-73-49-000-005),
		and (Ref. AMM TASK 71-73-49-400-005). There is no limit to the number of dents allowed, but they must be less than the allowable limits.
C.Flat areas	Maximum length must be less than 3 times the outside diameter of the tube. Contour change must be less than 20 percent of the outside diameter of the tube.	If flat area is less than the allowable limits, repair the tube at next 750 Flight Hours / 750 Flight Cycles / 4 calendar months (whichever the earliest). If the flat area is more than the allowable limits, replace the tube (Ref. AMM TASK 71-73-49-000-040), (Ref. AMM TASK 71-73-49-400-040), (Ref. AMM TASK 71-73-49-000-041), (Ref. AMM TASK 71-73-49-400-041), (Ref. AMM TASK 71-73-49-000-042), (Ref. AMM TASK 71-73-49-400-042), (Ref. AMM TASK 71-73-49-000-043), (Ref. AMM TASK 71-73-49-400-043), (Ref. AMM TASK 71-73-49-000-044), (Ref. AMM TASK 71-73-49-400-044).
		and (Ref. AMM TASK 71-73-49-000-045), (Ref. AMM TASK 71-73-49-400-045), (Ref. AMM TASK 71-73-49-000-046), (Ref. AMM TASK 71-73-49-400-046), (Ref. AMM TASK 71-73-49-000-047), (Ref. AMM TASK 71-73-49-400-047), (Ref. AMM TASK 71-73-49-000-048), (Ref. AMM TASK 71-73-49-400-048), (Ref. AMM TASK 71-73-49-000-049),
		and (Ref. AMM TASK 71-73-49-400-049), (Ref. AMM TASK 71-73-49-000-001), (Ref. AMM TASK 71-73-49-400-001), (Ref. AMM TASK 71-73-49-000-002), (Ref. AMM TASK 71-73-49-400-002), (Ref. AMM TASK 71-73-49-000-003), (Ref. AMM TASK 71-73-49-400-003), (Ref. AMM TASK 71-73-49-000-004), (Ref. AMM TASK 71-73-49-400-004),
		and (Ref. AMM TASK 71-73-49-400-005), (Ref. AMM TASK 71-73-49-000-005). There is no limit to the number of flat areas allowed, but they must be less than the allowable limits.
D.Nicks, scratches, chafing, scores	Maximum depth 0.005 in. (0.13 mm).	If the damage is less than the allowable limits, repair the tube at next 750 Flight Hours / 750 Flight Cycles / 4 calendar months (whichever the earliest). If the damage is more than the allowable limits, replace the tube (Ref. AMM TASK 71-73-49-000-040), (Ref. AMM TASK 71-73-49-400-040). (Ref. AMM TASK 71-73-49-000-041), (Ref. AMM TASK 71-73-49-400-041), (Ref. AMM TASK 71-73-49-000-042), (Ref. AMM TASK 71-73-49-400-042), (Ref. AMM TASK 71-73-49-000-043), (Ref. AMM TASK 71-73-49-400-043), (Ref. AMM TASK 71-73-49-000-044), (Ref. AMM TASK 71-73-49-400-044), (Ref. AMM TASK 71-73-49-000-045).
		and (Ref. AMM TASK 71-73-49-400-045), (Ref. AMM TASK 71-73-49-000-046), (Ref. AMM TASK 71-73-49-400-046), (Ref. AMM TASK 71-73-49-000-047), (Ref. AMM TASK 71-73-49-400-047), (Ref. AMM TASK 71-73-49-000-048), (Ref. AMM TASK 71-73-49-400-048), (Ref. AMM TASK 71-73-49-000-049), (Ref. AMM TASK 71-73-49-400-049),
		and (Ref. AMM TASK 71-73-49-000-001), (Ref. AMM TASK 71-73-49-400-001), (Ref. AMM TASK 71-73-49-000-002), (Ref. AMM TASK 71-73-49-400-002), (Ref. AMM TASK 71-73-49-000-003), (Ref. AMM TASK 71-73-49-400-003), (Ref. AMM TASK 71-73-49-000-004), (Ref. AMM TASK 71-73-49-400-004), (Ref. AMM TASK 71-73-49-000-005),
		and (Ref. AMM TASK 71-73-49-400-005). There is no limit to the number of nicks, scratches, chafing or scores allowed, but they must be less than the allowable limits.
E.Wrinkles in bends	Maximum depth must be less than 10 percent of the tube diameter.	If the damage is more than the allowable limits, replace the tube (Ref. AMM TASK 71-73-49-000-040), (Ref. AMM TASK 71-73-49-400-040). (Ref. AMM TASK 71-73-49-000-041), (Ref. AMM TASK 71-73-49-400-041), (Ref. AMM TASK 71-73-49-000-042), (Ref. AMM TASK 71-73-49-400-042), (Ref. AMM TASK 71-73-49-000-043), (Ref. AMM TASK 71-73-49-400-043), (Ref. AMM TASK 71-73-49-000-044), (Ref. AMM TASK 71-73-49-400-044), (Ref. AMM TASK 71-73-49-000-045).
		and (Ref. AMM TASK 71-73-49-400-045), (Ref. AMM TASK 71-73-49-000-046), (Ref. AMM TASK 71-73-49-400-046), (Ref. AMM TASK 71-73-49-000-047), (Ref. AMM TASK 71-73-49-400-047), (Ref. AMM TASK 71-73-49-000-048), (Ref. AMM TASK 71-73-49-400-048), (Ref. AMM TASK 71-73-49-000-049), (Ref. AMM TASK 71-73-49-400-049),
		and (Ref. AMM TASK 71-73-49-000-001), (Ref. AMM TASK 71-73-49-400-001), (Ref. AMM TASK 71-73-49-000-002), (Ref. AMM TASK 71-73-49-400-002), (Ref. AMM TASK 71-73-49-000-003), (Ref. AMM TASK 71-73-49-400-003), (Ref. AMM TASK 71-73-49-000-004), (Ref. AMM TASK 71-73-49-400-004), (Ref. AMM TASK 71-73-49-000-005),
		and (Ref. AMM TASK 71-73-49-400-005).

5. Close-up
Subtask 71-73-49-420-076-A ** ON A/C NOT FOR ALL

A. Install Oil, Hydraulic, Fuel and Water Drain Tubes and hose.

Subtask 71-73-49-410-089-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 71-73-49-440-054-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041):

Subtask 71-73-49-410-072-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(4) Remove the access platform(s).
(5) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:24:19 UTC