TB 1-1520-238-20-139
7.13.2. Inspect forward fuel cell and pilot's collective bellcrank for chafing and/or interference with flight
controls, structural deterioration, security, and damage to host helicopter. (Not required if restraint panel is
installed IAW TB 1--1520--238--20--107). Access L160.
7.13.2.1. If forward fuel cell restraint panel/cover is not installed, perform the following inspection:
NOTE
The forward fuel cell shall be full of fuel. The APU shall be run for 10 minutes
with the Nitrogen Inerting System (NIU) functional.
7.13.2.2. Run the APU at least 10 minutes to pressurize the forward fuel cell. Ensure NIU is operational.
7.13.2.3. Gain access to the pilot's collective bellcrank by removing cover L160.
7.13.2.4. Place the pilot collective control in the full down position.
7.13.2.5. Inspect for 1/8th inch (0.125) minimum clearance between the collective bellcrank and forward fuel
cell. If clearance is less than 0.125 inch, install fuel cell restraint panel.
7.14. Add 250 Hour Flight Control Inspection.
7.14.1. (AH--64A) CPG decoupler (SPAD) units for cracks, corrosion, security, evidence of interference, and
for looseness or lost motion. Access B75R, B90, B120 (BUCS AIRCRAFT ONLY)
7.14.2. (AH--64A only) CPG decoupler (SPAD) shear pins for damage or partial shearing. Access B60
(BUCS AIRCRAFT ONLY)
7.14.3. (AH--64A only) Perform adjustment and electrical check on CPG decoupler (SPAD) units' micro
switches. Access B60 (BUCS AIRCRAFT ONLY)
7.14.4. (AH--64A) Pilot decoupler (SPAD) units for cracks, corrosion, security, evidence of interference, and
for looseness or lost motion. Access B75R, B90, B120 (BUCS AIRCRAFT ONLY)
7.14.5. (AH--64A only) Pilot decoupler shear pins for damage or partial shearing.
(BUCS AIRCRAFT ONLY) Access B90, B120
7.14.6. (AH--64A only) Perform adjustment and electrical check on pilot decoupler (SPAD) units micro
switches. (BUCS AIRCRAFT ONLY) Access B90, B120
8. SPECIAL TOOLS AND FIXTURES REQUIRED. Not Applicable.
9. SUPPLY/PARTS (REQUISITION/DISPOSITION). Not Applicable.
10. MAINTENANCE APPLICATION.
10.1. Category of maintenance - AVUM.
10.2. Estimated time required Not applicable.
10.3. TB/MWO/ECP to be applied prior to or concurrently with this Technical Bulletin: Not applicable.
11. PUBLICATIONS.
11.1. References:
11.1.1. AR 95-1, Flight Regulations.
11.1.2. DA Pam 738-751, Functional Users Manual For The Army Maintenance Management System -
Aviation (TAMMS).
11.1.3. TB 55-1500-337-24, Phase Maintenance System For Army Aircraft.
11.1.4. TM 1-1500-204-23, Volume 1-9, Aviation Unit Maintenance (AVUM), and Aviation Intermediate
Maintenance (AVIM) For General Aircraft Maintenance (General Maintenance Practices).
11.1.5. TM 1-1500-328-23, Aeronautical Equipment Maintenance Management Policies and Procedures.
11.1.6. TM 1-1520-238-PM, Phase Maintenance Inspection Checklist For Army AH-64A Helicopter.
11.1.7. TM 1-1520-238-PMD, Preventive Maintenance Daily Inspection Checklist For Army AH-64A Heli-
copter.
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