TASK 74-11-38-200-408 Ignition Exciters - Related Parts - Examine The Titanium Brackets, Inspection-008

DMC:V2500-A0-74-11-3800-07A-300A-C|Issue No:001.00|Issue Date:2013-11-01

Export Control

EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.

Copyright

© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).

Applicability

All

Common Information

TASK 74-11-38-200-408 Ignition Exciters - Related Parts - Examine The Titanium Brackets, Inspection-008

Effectivity

FIG/ITEM

PART NO.

01-170

6A5972

01-180

6A5628

01-180

6A8081

01-470

6A5971

01-570

6A5973

01-580

6A5747

General

This TASK gives the procedure for the inspection of the ignition exciter titanium brackets. For the ignition exciter brackets and other parts, refer to Inspection-000 TASK 74-11-38-200-400.

Fig./item numbers in parentheses in the procedure agree with those used in the EIPC. Only the primary Fig./item numbers are used. For the service bulletin alpha variants refer to the EIPC.

The policy that is necessary for Inspection is given in the SPM TASK 70-20-01-200-501.

All the parts must be cleaned before they are examined. Refer to Cleaning-000 TASK 74-11-38-100-400.

All the parts must be visually examined for damage, corrosion and wear. Any defects that are not identified in the procedure must be referred to IAE.

The procedure for those parts which must have a crack test is given in the relevant SUBTASK. Do the crack test before the part is visually examined.

Do not discard a part until you are sure there are no repairs available. Refer to the instructions in Repair before a discarded part is used again or oversize parts are installed.

Parts which must be discarded can be held although no repair is available. The repair of a discarded part could be shown to be necessary at a subsequent date.

All parts must be examined to make sure that all the repairs are completed satisfactorily.

Practices and processes referred to in the procedure by the TASK/SUBTASK number are in the SPM.

Reference

Refer to the SPM for data on these items.

Definitions of Damage- Specified Types of Damage, SPM TASK 70-02-02-350-501.

Inspection Policy and Inspection of Parts, SPM TASK 70-20-01-200-501.

Some data on these items is contained in this TASK. For more data on these items refer to the SPM.

Methods of Testing for Crack Indications

Chemical Processes

Surface Protection

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 74-11-38-220-080 Examine all the Titanium Brackets for Cracks

      1. Clean the brackets

      1. Clean the parts. Refer to Cleaning-001 TASK 74-11-38-100-401.

      2. Do a crack test of the parts that follow.

        1. Brackets. Refer to SPM TASK 70-23-02-230-501.

          1. Cracked

          1. Reject

    2. SUBTASK 74-11-38-220-081 Examine the Surface of the Brackets

      1. Examine all the surfaces

        1. Nicked

          1. Nicked to a depth of 0.002 in. (0.05 mm)

          1. Accept

          2. More than in Step.

          1. Reject

        2. Dented

          1. Dented to a depth of 0.150 in. (3.8 mm) with a large surface area

          1. Accept

          2. More than in Step.

          1. Reject

        3. Scratched

          1. Scratched to a depth of 0.002 in. (0.05 mm)

          1. Accept

          2. More than in Step.

          1. Reject

    3. SUBTASK 74-11-38-220-082 Examine the Brackets (01-180, 6A5628), (01-180, 6A8081) and (01-580, 6A5747) 
      (SB 74-0001 and SB 74-0005)

      1. Bolt holes burred

      1. Reject

      2. Examine the mounting flange bolt holes

        1. Worn

          1. If the hole diameter is between 0.346 in (8.80 mm) and 0.360 in (9.16 mm)

          1. Accept

          2. If the hole diameter is larger than 0.360 in (9.16 mm).

          1. Reject

      3. Examine the slotted holes

        1. Worn

          1. If the length of slotted hole is not more than 0.472 in (12.0 mm) and the width is not more than 0.297 in (7.56 mm)

          1. Accept

          2. If the dimensions are larger than in Step.

          1. Reject

      4. Examine the clip position holes

        1. Worn

          1. If the diameter of the hole is between 0.220 in (5.60 mm) and 0.232 in (5.90 mm)

          1. Accept

          2. If the diameter is larger than 0.232 in (5.90 mm)

          1. Reject

      5. Examine the anchor nuts

        1. Threads

          1. Pick-up

          1. Reject

          2. Crossed or stripped

          1. Reject

        2. Rivets

          1. Loose/missing

          1. Reject

    4. SUBTASK 74-11-38-220-083 Examine the Bracket Bolt Holes (01-170, 6A5972) and (01-570, 6A5973) 
      (SB 74-0001)

      1. Bolt holes burred

      1. Reject

      2. Examine the mounting flange bolt holes

        1. Worn

          1. If the diameter of the hole is between 0.283 in (7.20 mm) and 0.297 in (7.56 mm)

          1. Accept

          2. If the diameter is larger than 0.297 in (7.56 mm)

          1. Reject

      3. Examine one top bolt hole

        1. Worn

          1. If the diameter of the hole is between 0.314 in (8.00 mm) and 0.329 in (8.36 mm)

          1. Accept

          2. If the diameter is larger than 0.329 in (8.36 mm)

          1. Reject

      4. Examine the bonding strap bolt hole

        1. Worn

          1. If the diameter of the hole is between 0.314 in (8.00 mm) and 0.329 in (8.36 mm)

          1. Accept

          2. If the diameter is larger than 0.329 in (8.36 mm)

          1. Reject

    5. SUBTASK 74-11-38-220-084 Examine the Bracket Support (01-470, 6A5971) 
      (SB 74-0001)

      1. Bolt holes burred

      1. Reject

      2. Examine the six bolt holes

        1. Worn

          1. If the diameter of the hole is between 0.283 in (7.20 mm) and 0.297 in (7.56 mm)

          1. Accept

          2. If the diameter is larger than 0.297 in (7.56 mm)

          1. Reject

      3. Examine the two bolt holes

        1. Worn

          1. If the diameter of the hole is between 0.314 in (8.00 mm) and 0.329 in (8.36 mm)

          1. Accept

          2. If the diameter is larger than 0.329 in (8.36 mm)

          1. Reject

Requirements After Job Completion

Follow-On Conditions

NONE