TB 1-1520-238-20-134
6. SPECIAL PROVISIONS TO TB REQUIREMENTS (AIRCRAFT)
6.1 Aircraft in AVUM, AVIM, or Depot level maintenance Commanders, facility managers and contractors
will not issue aircraft until they are in compliance with this message.
6.2 Aircraft at Contractor Facility DD 250 aircraft will be inspected prior to departing for ferry to final
destination.
6.3 Aircraft in Surface/Air Shipment Unit Commanders in receipt of deployment orders may defer the initial
inspection for aircraft scheduled to depart before the date specified in Paragraph 4.1. (Initial TAMMS
Compliance Requirement) as follows Comply with message requirements NLT 30 days upon arrival at final
destination.
7. TECHNICAL PROCEDURES/INSTRUCTIONS
7.1 Initial Inspection On or before the next 30 days, lower the torque on the pylon mounting bolts as
follows.
NOTE
This procedure is to be performed on one bolt at a time and is typical for all
four pylon bolts.
7.1.1 Remove external stores IAW TM 9-1090-208-23-1 or IETM.
7.1.2 Remove bolt and washer, TM 1-1520-238-23P, Figure 697, Item 1 and 2, or the IETM, from the pylon.
7.1.3 Inspect bolt for damage. None allowed.
7.1.4 Lubricate the bolt threads using MIL-T-83483.
7.1.5 Reinstall bolt and washer.
7.1.6 Torque bolt to 350 inch-pounds.
7.1.7 Repeat paragraph 7.1.1. to 7.1.6. for the remaining mounting bolts for each pylon.
7.1.8 Clear the initial entry from para 4.1. and note compliance on DA Form 240815.
7.1.9 Annotate the DA Form 240818 with a recurring 30 day inspection (IAW para 7.2.) for the pylon
mounting bolt torque check. ULLSA Units will use an "800" inspection number for the recurring 30 day pylon
mounting bolt torque check.
7.2 Recurring Inspection Every 30 days perform the following recurring pylon mounting bolt torque check.
7.2.1 Using an appropriate torque wrench set at 315 inch-pounds, insure bolt does not turn.
7.2.1.1 If bolt turns Proceed to either paragraph 7.3. (AH-64A) or paragraph 7.4. (AH-64D) of this TB and
replace both the bolt and barrel nut.
7.2.1.2 If bolt does not turn Set torque wrench to 350 inch-pounds and insure bolt is torqued.
7.2.2 This recurring inspection will be required until hardware to replace bolt HS5271-6-21 and barrel nut
HS4379-6 is available and installed. When the hardware becomes available, a future TB will be published
providing the part numbers for the new bolt and barrel nut.
NOTE
The procedures in paragraphs 7.3. and 7.4. are written for removal and re-
placement of all four pylon barrel nuts. If only one barrel nut is being re-
placed, only remove those components required to assist in the access to
the barrel nut being replaced.
7.3 AH-64A Pylon barrel nut replacement procedures.
7.3.1 Remove external stores IAW TM 9-1090-208-23-1.
7.3.2 Remove the pylons IAW TM 1-1520-238-23 paragraph 16.2.
7.3.3 Remove access covers RW7, RW8, LW7 and LW8.
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