TB 1--1520--237--20--227
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, if PR1775 is not available, the following sealants are permitted as al-
ternatives in the order of preference as listed:
SPECIFICATIONS/NOMENCLATURE
PN/NSN
MIL--S--81733, B--2
Commercial Name is PR1436GB2
MIL--PRF--81733, Type II, Pro Seal 870--B--2
8030--01--124--7622
8030--00--009--5023
MIL--PRF--81733, Type IV, Pro Seal 870--B--2
8030--01--395--2726
MIL--S--8802, Class B2, Pro Seal 890 B--2
8030--01--753--4599
8030--00--723--2746
8030--00--680--2041
NOTE
If the alternative sealants are not available, contact the Technical POC IAW para 16a.
(g) As soon as practicable, but NLT 6 Dec 00, perform the inspection required IAW para-
graph 8a(2) of this message.
(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.
(c) Discard the jackpad bolt retention nut.
(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.
4