References. - TB-1-1520-240-20-1310005

TB 1-1520-240-20-131

TOTAL COST PER AIRCRAFT (IF BOTH HUBS HAVE CRACKS) = $335,458

TB/MWOs to be Applied Prior to or Concurrently with this Inspection. N/A.

e. Publications Which Require Change as a result of this Inspection -- The following publications shall

be changed as noted below to reflect this message. A copy of this message shall be inserted in the appropriate

TM as authority to implement the change until the printed change is received.

(1) TM 55--1520--240--23, Aviation Unit and Avition Intermediate Maintenance Manual, CH--47D

Helicopter -- Add the following requirement to conditional inspections -- "Eddy current inspection of hubs with

lightening holes is required. Prior to installation, inspect the area surrounding the vertical web".

(2) TM 1--1520--252--23 Aviation Unit and Aviation Intermediate Maintenance Manual, MH--47E

Helicopter -- Add the following requirement to conditional inspections -- "Eddy current inspection of hubs with

lightening holes is required. Prior to installation, inspect the area surrounding the vertical web".

(3) TM 55--1520--240--PM, CH--47D Helicopter Phased Maintenance Checklist. The following

statement shall be added to area #6, aft rotor and pylon and area #7, forward rotor, crown, and tunnel, "Per-

form eddy current inspection of area surrounding the vertical web lightening holes on rotor hubs that contain

such lightening holes". This inspection shall be required at each phased maintenance interval.

(4) TM 1--1520--252--PM, MH--47E/AWC Helicopter Phased Maintenance Checklist. The follow-

ing statement shall be added to area #6, aft rotor and pylon and area #7, forward rotor, crown, and tunnel,

"Perform eddy current inspection of area surrounding the vertical web lightening holes on rotor hubs that con-

tain such lightening holes". This inspection shall be required at each phased maintenance interval.

13. References.

DA PAM 738--751, 15 MAR 99.

TM 55-1520-240-23, Aviation Unit and Aviation Intermediate Maintenance Manual, CH--47D Heli-

copter.

TM 1-1520-252-23, Aviation Unit and Aviation Intermediate Maintenance Manual, MH--47E Helicop-

ter.

TM 55--1520--240--PM, CH--47D Helicopter Phased Maintenance checklist.

TM 1--1520--252--PM, MH--47E/AWC Helicopter Phased Maintenance Checklist.

14. Recording and Reporting Requirements.

a. Reporting Compliance Suspense Date (Aircraft). Upon entering requirements of this Technical Bul-

letin on DA Form 2408-13-1 on all subject mission design series (MDS) aircraft, Commanders will forward

a priority message, datafax or e-mail to Commander, AMCOM, ATTN: AMSAM--SF--A (SOF Compliance Of-

ficer), Redstone Arsenal, AL 35898-5000, in accordance with AR 95-1. Datafax number is DSN 897--2111

or commercial (256) 313--2111. E-Mail address is "safeadm@redstone.army .mil". The report will cite this

message and TB number, date of entry in DA Form 2408-13-1, the aircraft MDS and serial numbers of aircraft

in numerical order.

b. Task/Inspection Reporting Suspense Date (Aircraft). Upon completion of inspection, Commanders

will forward a priority message to logistic point of contact in paragraph 16b. The report will cite this message

and TB number, date of inspection, aircraft serial number, aircraft and component hours, and results of the

inspection. Inspection and reports will be completed no later than 23 NOV 00.

Reporting Message Receipt (SPARES). N/A.

Task/Inspection Reporting Suspense Date (SPARES). N/A

(1) Materiel in Wholesale Depot Storage -- N/A.

(2) Materiel in Retail Storage -- N/A.

e. The following Forms are Applicable and are to be Completed in Accordance with DA Pam 738--751,

15 Mar 99.