Inspection Procedures-continued - TB-1-1520-237-20-2250004

TB 1--1520--237--20--225

NOTE

If movement of the jackpad occurs, sealant must be removed from lower surface of the jack-

pad/drag beam interface and replaced after the nut is retorqued.

(e) Retorque the retention nut to 45--50 foot--pounds (540--600 inch--pounds).

(f) Apply sealant to nut and immediate area IAW TM 1--1520--237--23, para 3--4--5.1, and

TM 1--1520--250--23, para 3.1.6.1.

NOTE

For this inspection only PR1436GB--2 is permitted as an alternative sealant.

(g) As soon as practicable, but NLT 6 Dec 00, perform the inspection required IAW para-

graph 8a(2) of this message.

(2) If the items listed in paragraph 10a are available:

(a) Remove jackpad bolt from drag beam IAW TM 1--1520--237--23, para 3--4--5, and TM

1--1520--250--23, para 3.1.6. Remove the top and bottom sealing washers using extreme care to avoid

damaging the washers to allow for reuse. Removal of tie down ring from the jackpad bolts is not neces-

sary.

NOTE

TM 1--1520--237--23 and TM 1--1520--23 refer to the sealing washer as a "Washer" the FEDLOG

and TM 1--1520--237--23P and TM 1--1520--23P refer to the sealing washer as "Packing with Re-

tainer".

(b) Inspect sealing washer for serviceability. Replace if the seal is damaged.

(d) Clean the drag beam surface within a 2 inch radius of the jackpad bolt holes, top and bot-

tom IAW TM 1--1520--237--23, para 3--4--5.1.1.e and TM 1--1520--250--23, para 3.1.6.1.e. Using a 10X

magnifier inspect the cleaned area and the inside diameter of the jackpad bolt holes for:

(1) Inspect for any evidence of cracks. If a crack is found or suspected, proceed to

NOTE

No cracks allowed.

(2) Inspect for corrosion IAW TM 1--1520--237--23, para 3--3--1, and TM

1--1520--250--23, para 3.1.3. If corrosion is found, proceed to paragraph 9b.

(e) If no cracks or corrosion are found, reinstall the jackpad bolt as follows:

CAUTION

Do not apply touchup paint to the sealant.

NOTE

PR1775 is the required sealant for this inspection.

(1) Using a reduced torque of 45--50 foot--pounds (540--600 inch--pounds), reinstall

the jackpad bolt and washers with a new nut IAW TM 1--1520--237--23, para 3--4--5, and TM

1--1520--250--23, para 3.1.6.

(2) After covering the dust plug with seal compound IAW TM 1--1520--237--23, para

3--4--5.1, and TM 1--1520--250--23, para 3.1.6.1, apply torque stripe to the dust cap and retention

nut.