PS Magazine Issue 160 1966 Series [160 ed.]

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Citation preview

SUPPl,y You',-e got to be aecorate when yoo order repair parts for your nlaintenallce operations and supplies (or__.---::~"!iI~;;;; your outfit. No . l-A c curate manua ls. You' ve got to use th e latest u p_ to-date parts manual for your

equipment. If you don't hllve the latest, see th e index, DA Pam. phlet 3 10-4 dated May 65 for

No. 2-Accuratc pencil. When you fill out your requisitio n, DA

Form 2765 or 2765·1, be rea] careful that you jot down the right numbers. You and your huddy can r ead it back and fo rth a coup le of times to make slire.

Too often the eye, the brain and

ACCURACY

IN THIS ISSU! FIREPOWER

2·17

Nike-lWc$ectlon 2·" 3.S-inRocketlauncbtr 14U

what's available, and order copies on VA Form 17. The same goes for supply manuals except the index you use is DA Pamphlet 310-6 dated Jul 65_

the hand won't work togetbertwo 2'8 and a 3 come oul two 3'8 and a 2, and such-1ike. A recent check showed that more than hall the bounced requisitions were caused by ~'human error," the slip of the pencil, eye or brain.

811l1, M14 11

EntineHtltShotk 1"19 MI07--MllO zo.21 MI08-MI!19 Z2 Mll3 n MISI 24,25

AIR MOBIPTY OH·l3E

JJ

37-4S

!:annibalJllq

42"'3

1:I:-T1::r -:CtluteStraps~~~C44

:;

4!

GENERAL AND SUPPLY No. I Supplemental ToolKit M-U

MUStdGenerator It DA2403-2 ... CIj)-P1urs 11 Toot taU 14 Min. Detector l2.Q PublJeatiOll$ 21 SUpply 1, 1,tD,U,H.21,U,Q

11$1 "

hi_ ttl

prlllthta: " tIIis pub!lc.

tIon 11K bUll IJIImtd " H'a44l1.1rten. Dt,.rt.tIIt., IN n,. It f'_flI"'Y illS!. DISTRIBUTION: III accordallet witll re·

IIllrt111eats $lbmitted on DA Form 12-4.

'"'$'"'9"~"-:-d/::--M. ~""--:-', P$Af~, q.r»I~_, ~1.

110121

That's why top-notch generator operators are always spoutin' off special maintenance rules, like so:

Whatever the make, model, capacity, age or temperament, there's no such thing as routine PM on power generators. You tackle the simplest before-, during-and after-operation checks and services with sharp eyes, ears and nose, and one-day-pass determination.

learn your trouble shooting SOP's up-anddown and sideways, but never port with the maintenance manuals. Operator's and maintenance manuals must always be either on the spot or within easy yelling distance. Whether the generators are run just long enough so the crew can pull its daily equipment checks with tactical power, or whether the outfit stays on tactical power a good bit of the time, you alternate generators at least daily. That way each one (including the one selected for standby) will get in some operatingtime Never shy away from a generator just because it's hard to start, or it takes more than normal watching during operation. Favoring a stubborn one, keeping it idle (and your fingers crossed hoping you'll never need it) can cause real panic if it's ever needed in an emergency. The answer is: Work with it until you learn all its tricks. If the rebel continues to defy your wits, let the support people check it over.

And, above all, check with support on the double on any problem you can't take [Ore of right away.

3. (leon and check batteries daily. And, nix on just otIding water. Pay special attention to electrolyte reading. If batteries aren't as strong as they should be, the current will be drained the engine safety circuit and' the engine won't start, or it'll out. (heck and clean battery charger daily.

4. Never press the starter switch longer than 1M allows (20-30 seconds!. If the engine doesn't start, allow the molor 2-5 minutes for cooling before you hit the stort switch again.

And, last but not least, review

37

For want of a cotter pin the nut was lost. For want of a nut the aircraft was lost. For want of an aircraft the battle ... but hold opel!! All is not lost- when you put your bird in the safety triangle by using the right nut, a torque wrench and the right cotter pin.

For want of a cotter pin the nut was lost. For want of a nut the aircraft was lost. For want of an aircraft the battle ... but hold ope!!! All is not lost- when you put your bird in the safety triangle by using the right nut, a torque wrench and the right cotter pin.

FOUOW THE SPECIAL TORQUES

The Caution on Page 8-15, Chapter 2, of TM 55-1520-211-20 (9 Apr 65)

'Course there's always an exception . to a standard torque. This is a torque value put on a nut by the manufacturer and is given right in the text of the maintenance operation. Let's take a f'rinstance. Say you're changing the main rotor hub and blade on a Huey (UH-IA, B)_

I .

CAunoN

I

says that you torque the pitch. link bolt nuts to a special value of 80·100 inchpounds on the A Model. You'll also notice that you should pull a special torque inspection of the newly-installed nut after the first 10 hours of operation. That's because this nut and bolt combination has a tendency to lose initial torque. When you're changing the main rotor hub and blade on the B Model according to the poop on Page 8·15 of TM 55-1520·211·20, you'll notice that there's no spe· cial torque value on the pitch-link bolt nuts. So you use the standard torque table in the maintenance pub for this larger-size bolt and nut combination.

USE THE TORQUE TABLE You don't have to eye a nut with a magnifying glass or guess the part number and size. One foolproof method is co check the parts pub, TM 55-1520-211-20P (24 Aug 65)_ This step

pays dividends by giving you the right nut ... beats forced landings caused by use of the wrong one.

39

FOUOW THE SPECIAl TORQUES

The Caution on Page 8·15, Chapter 2, of TM 55·1520·211·20 (9 Apr 65)

'Course there's always an exception , to a standard torque. This is a torque

I

value put on a nut by the manufacturer

CAUTION

I

and is given right in the text of the maintenance operation. Let's take a f'rinstance. Say you're changing the main rotor hub and blade on a Huey (UH·1A, B). says that you torque the pitch.link bolt nuts to a special value of 80·100 inchpounds on the A Model. You'll also notice that you should pull a special torque inspection of the newly-installed nut after the first 10 hours of operation. That's because this nut and bolt combination has a tendency to lose initial torque. When you're changing the m ain rotor hub and blade on

the B Model according to the poop on Page 8-15 of TM 55-1520-211-20, you'll notice that there's no special torque value on the pitch-link bolt nuts. So you use the standard torque table in the maintenance pub for this larger-size bolt and nut combination.

USE THE TORQUE TABLE You don't have to eye a nut with a magnifying glass or guess the part number and size. One foolproof method is to check the parts pub,

TM 55·1520·211·20P (24 Aug 65). This step pays dividends by giving you the right nut ... beats forced landings caused by use of the wrong one.

39

Figure 176, index numbers 7. 26 and 30 of the parts pub calls for nut, AN 310·4, for the A Model ... no sweat since this baby has the special corque. For the B Model the three nuts are AN 320-6 and AN 310-6.

GET THE RIGHT PART NUMBEI< STEP IS TO CHECK OUT TI-oIE SIZEl

0.., off yow topy of TM 55-405-7 130 Aug 67) on airaaft hardwore and him '0 Pogo 47_"" ItIread .iIl of "" Ilwo AH 370-6 nuts is '/. -24. 10-32 Nf-3

,,"1320·3

1/~-28

NF-3

"N320D5

""16-2. NF·3

"N320-7

"N320D7

7/16-2CNF-3

AN320-8

"N320D8

1/2-20NF-3

AN320-5

3!8-Z. NF-J

AN320-6

How, " ad< yo.r TM 55-1570-211 -70 '0 "" " ...donl 'orque 'obl. on Pogo 1-16 and IIIIIId! up "" AH 370 ,01.011 with "" '/.-74 nul . ze, To.r 'orque is 95-110 inch-pounrl., .... 'nuff, 114_28

7/16

50_70

30-40

70_90

.5116-24

1/2

100-1 ..0

60-8,

140_203

318-24

9/16

160-190

9.5-110

7116-20

',I< 18

'50-500

- 270_300

500-756

In-20

480-690

290-410

690-990

9/16-18

7/8

800-1000

480-600

lQCK)-1 ....0

19O-J~

You foHow the same set-up for the AN 310-6 nut . .. TM 55·405·2, Page 37. Match up the AN 310 column with the Ys-24 nut size in the torque table and your corque is 160-190 inch-pounds. Yessir, getting real familiar with the torque wrenches in your general mechanic's and organizational maintenance A, Band C tool kits is a sure sign that you're pulling top·drawer maintenance. 50-0·0-0 . • • the next time you put a part on your hird be sure your hird's in the triangle of safety. Using the right nut (a new one at all control and other critical places), a torque wrench and the proper cotter pin or safety wire is all it takes. 40

~

can spot a tinker mechanic a mile away. the type who keeps making ad j ustments on bird parts even tho the organizational maintenance pub doesn't call for them. Take the carburetor. The pub lets a mechanic make some adjustments like the idle, throttle lever and such. He can also crank up the engine to check out these simple adjustments. This is where a good ear for smooth operation comes in mighty handy. But the tinker might as well have a tin ear if he tries to make an adjustment, say, on the automatic mixture control unit. Fine adjustments can only be accurately made during the Bow bench test at depot. That's because it's the only place where altitude, temperature and fuel density can be taken into account for all operations. 'Course a carburetor out of adjustment has to · be changed. But you wouldn't tinker with a carburetor, would you? Not when you can save yourself time and elbow grease by changing a bum carburetor right-off! 41

BEWARE: THIS BUSINESS OF •..

COTTON PICKIN' PARTS PLUCKIN' Cannibalizing parts from one grounded bird to get: another into the blue is OK in some cases, but nco Murphy knows it's not a htllthy habit: to be

~ttW·mro.

1i~~::~::~:;~~rrm~~[t~

Fact is, it's a last resort supply measu.re! l~.-"" Fix an eyeball on AR 750-1500·8 00 Apr 57), "'II:'.....t~...!!!I..1 the guide for cannibalizing aircraft parts. It says "'-l'~~"';i:=~_ your CO has to be sure that every other supply source has been tried-such as gertin' the part from another outfit near-by - before he can give you the green light on this kind of parts snatchin'.

....- - - !

m l1

..

You've been down all the supply roods and SOP takes more ~ime Ihon you've gal ....

~

. OOf? Your (m~t's mission will suRer if

:l ~a

-

you don t get the port....

. Don't lay a finger on a port that's been in a fire . . . Don't pluck a bird fa the point that it becomes mainly a SOUTce of "parts.

42

BEWARE, THIS BUSINESS OF . _• KEIP TH£ RECORDS STRAIGHT

COTTON PICK'N' PARTS PLUCK'N' Cannibalizing parts from onc grounded bird to get another into the blue is OK in some cases, but n'en Murphy knows it's not a healthy habit to be

1~~~E~~~~~m~~rIJ~r,,;;~....,..

gettin' Fact into. is, it's a last resOrt supply measure! ~ Fix an eyeball on AR 750-1500-8 (10 Apr 57), the guide for cannibalizing aircraft pares. It says your CO has to be sure that every other supply source has been tried -such as gettin' the part from an· other outfit near-by-before he can give you the green light on this kind of parts snatchin'.

"':z:...

There's no set practice for the pile of paperwork involved in cannibalizing, but it's mighty important to keep that paperwork straight. Generally speakingJf you take the parr off, you make an on the aircraft's DA Form 240813 (Aircraft Inspection and Maintenance Record) to show it's gone.

..

_~~

You make a date entry on DA the record of need for replocement was

(onfusin'? There's more: Only equipment thaI's not port of the bird itself, like radio sets, etc., are entered on DA 2408-17 (Aircraft Inventory Record).

. Don" loy a finger on a port that's been in a fire. . . Don't pluck a bird to the point that it becomes mainly a source of 'parts.

42

In addition to keepin' those records straight, verified copies of these supply actions should be included to boot! They should bear the John Henry of the maintenance officer and be completed for each shortage citing the authority for cannibalizing and the date it was granted . The paperwork's enough to discourage mOst parts cannibals. but it's darn necessary to keep the supply mill operatin'. It helps cut down on the number of hangar queens, too. 43

KEEP THE RE