Preliminary Requirements

Procedure

1. SUBTASK 71-00-02-450-005 Install the Forward Latch-Open Indicator

   1. Refer to Figure.

   2. Remove the two lower bolts and washers from the latch-open indicator support on the fan case.

   3. Install the latch-open indicator FORWARD OPEN LATCH INDICATOR-THRUST REVERSER (71-00-23, 01-010) on the support with the two bolts and washers at the lower bolt holes.

   4. Install the two bolts FORWARD OPEN LATCH INDICATOR-THRUST REVERSER (71-00-23, 01-020) and washers FORWARD OPEN LATCH INDICATOR-THRUST REVERSER (71-00-23, 01-030) to attach the forward latch-open indicator FORWARD OPEN LATCH INDICATOR-THRUST REVERSER (71-00-23, 01-010) mounting bracket to the fan case at the upper bolt holes.

   5. Torque the bolts to between 85 and 105 lbf.in (10 and 12 Nm).

      .

2. SUBTASK 71-00-02-420-060 Install the Open Latch Indicator (Pre SBE 72-0435 and SBE 72-0435)

   1. Refer to Figure.

   2. Pre SBE 72-0435 Remove the outer two of the three bolts, washers and nuts ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-130), ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-120) and ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-110) which attach the No. 6 strut fairing panel ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-100) to the panel support bracket ENGINE-FAN CASE (72-32-85, 01-010). It is not necessary to remove the center bolt/washer/nut.

   3. SBE 72-0435 There are only two bolts, washers and nuts ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-130), ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-120) and ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-110) which attach the No. 6 strut fairing panel ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-100) to the panel support bracket ENGINE-FAN CASE (72-32-85, 01-010).

   4. Apply the dissimilar metal protection compound.

      1. 

         WARNING

         WHEN YOU USE CoMat 01-076 METHYL ETHYL KETONE YOU MUST MAKE SURE THERE IS SUFFICIENT VENTILATION. YOU MUST USE THE CORRECT PROTECTIVE CLOTHING. YOU MUST NOT SMOKE. DO NOT PUT THE SOLVENT NEAR A SOURCE OF HEAT.

         THE MATERIALS USED IN THE COMPOUND ARE FLAMMABLE AND TOXIC. DO NOT BREATHE THE VAPORS GIVEN OFF. YOU MUST PUT ON GLOVES WHEN YOU MIX AND USE THE COMPOUND.

         

         CAUTION

         YOU MUST USE CARE WHEN YOU USE CoMat 01-076 METHYL ETHYL KETONE AS IT CAN CAUSE DAMAGE TO THE SURFACE PROTECTION. REFER TO SPM TASK 70-38-21-380-501 TO REPAIR THE SURFACE PROTECTION.

         Mix a sufficient quantity of CoMat 08-029 PRIMER BASE, CoMat 07-067 PRIMER CONVERTER and CoMat 07-066 THINNER in a ratio of one part each by volume of the primer base/curing solution and one tenth by volume of the thinner.

      2. Clean the mating surfaces of the open latch indicator and the bolts/washers with CoMat 01-076 METHYL ETHYL KETONE. Use a clean cloth made moist with the solvent. Dry the mating surfaces with a clean dry cloth.

      3. Apply a thin layer of the compound to the surfaces of the four bolt head washer faces and the two washers FORWARD OPEN LATCH INDICATOR-THRUST REVERSER (71-00-23, 01-020), FORWARD OPEN LATCH INDICATOR-THRUST REVERSER (71-00-23, 01-030) and ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-130).

   5. Install the open latch indicator.

      1. Attach the open latch indicator and the two shims FORWARD OPEN LATCH INDICATOR-THRUST REVERSER (71-00-23, 01-010) and FORWARD OPEN LATCH INDICATOR-THRUST REVERSER (71-00-23, 01-040) to the No. 6 strut fairing panel ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-100) with the two bolts and the two washers FORWARD OPEN LATCH INDICATOR-THRUST REVERSER (71-00-23, 01-020) and FORWARD OPEN LATCH INDICATOR-THRUST REVERSER (71-00-23, 01-030) (at the top position). Do this while the bolts and washers are wet with the compound.

      2. Install the two bolts, the two washers and the two nuts ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-130), ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-120) and ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-110) to attach the open latch indicator, the two shims and the No. 6 strut fairing panel to the panel support bracket ENGINE-FAN CASE (72-32-85, 01-010). Do this while the two bolts are wet with the compound.

      3. Torque the two bolts FORWARD OPEN LATCH INDICATOR-THRUST REVERSER (71-00-23, 01-020) and the two nuts ENGINE-INTERMEDIATE STRUCTURE (72-32-03, 02-110) to 85 to 105 lbf.in (10 to 12 Nm).

      4. Remove the unwanted compound from the adjacent surfaces with a clean cloth made moist with CoMat 01-076 METHYL ETHYL KETONE. Try to keep a small ring of the compound around the bolt head.

Figure: Install Forward Latch-Open Indicator

Install Forward Latch-Open Indicator



Figure: Install the Open Latch Indicator

Install the Open Latch Indicator