NAVAIR 13-1-6.1-1 Life Rafts

Question 1

What is covered in the NAVAIR 13-1-6.1-1 chapter 4?

Answer 1

The LR-1, a one man life raft assembly

Question 2

What is covered in the NAVAIR 13-1-6.1-1 chapter 6?

Answer 2

The LRU-18/U, a one man life raft assembly

Question 3

What is covered in the NAVAIR 13-1-6.1-1 chapter 9?

Answer 3

The LRU-13/A, seven man life raft assembly

Question 4

What is the LR-1 life raft constructed of?

Answer 4

Polychloroprene coated cloth

Question 5

What are the colors inside and outside of the weathershield in the LR-1?

Answer 5

The weathershield is nonspecular sea blue outside and bright red on the inside

Question 6

What size and type of thread is used to safety tie the LR-1 ripcord pins?

Answer 6

E thread single

Question 7

LR-1 measure time of inflation; liferaft shall inflate to designed shape without evidence of restriction in less than______?

Answer 7

One minute

Question 8

How many pounds you use for the cable proof load test?

Answer 8

50 pounds

Question 9

What PSIG do you inflate the LR-1 for visual test?

Answer 9

1.0 PSIG

Question 10

The LR-1 weight of CO2 is 0.50 lbs plus or minus what?

Answer 10

Plus or minus 0.01 pounds

Question 11

LR-1 leak test fill to 2.0 psig, wait 15 minutes record temp, barometric pressure, and allow to remain undisturbed for how long?

Answer 11

4 hours

Question 12

After an minimum of four hours test pressure shall not decrease to let than?

Answer 12

1.6 psig from a maximum test pressure of 2.0 psig

Question 13

LR-1. Tighten coupling nut to life raft inlet valve to a torque value of?

Answer 13

85 plus or minus 5 lbs

Question 14

LR-1 prepare solution of detergent (MIL-D-16791) consisting of 1/4 to 1/2 once of detergent per _____?

Answer 14

Gallon of water

Question 15

LR-1. Toluene shall be the primary solvent used in the fabrication or repaired of this assembly. ______ may be used if toluene is not available.

Answer 15

MEK

Question 16

One patch is completed, allow adhesive to cure a minimum _____ hours.

Answer 16

48 hours

Question 17

LRU-13/A. Special inspection shall be performed every?

Answer 17

30 days

Question 18

LRU-13/A. what radio is installed in the LRU-13/A?

Answer 18

AN/URT-33A

Question 19

LRU-18/U. What material is the LRU-18/U made of?

Answer 19

Heat-sealable, polyurethene-coated nylon cloth

Question 20

What is the configuration of the LRU-18/U?

Answer 20

It has two separate cells, each comprised of a series of tubes. The upper second, third and fourth tubes are inflated with carbon dioxide and the remaining tubes are inflated orally.

Question 21

What is the application of the LRU-18/U?

Answer 21

Mandatory for use by all authorized helicopter (Helicopter backpacks) and E-2C aircraft equipped with A/P22P-11 Crew backpack during overwater flights.

Question 22

What is the ideal temperature to perform maintenance on the LRU-18/U?

Answer 22

68 degrees F (20’ C)

Question 23

During the beaded inflation handle pull test, what is the the force to which fasteners should snap?

Answer 23

25 lbs

Question 24

During the leakage test on the LRU-18/U, to how many PSIGs should the CO2 cell be inflated and how many the Oral cell?

Answer 24

CO2 cell shall be inflated to 2.0 and minimum pressure to lose after 4 hours is to 1.6.
Oral cell shall be inflated to 1.0 and lose no more than to 0.6 after 4 hours.

Question 25

When reinstalling the inflation assembly with a new valve gasket, what is the torque value of the nut onto valve stem?

Answer 25

8 plus or minus 1 in-lb.

Question 26

When patching the LRU-18/U life rafts, how much larger than the damaged side should the patch be?

Answer 26

One inch larger on all sides

Question 27

How to secure the tether line to the inflation assembly of the LRU-18/U?

Answer 27

One loop with a lark’s head knot large enough to pass over the entire CO2 assembly, (between anti-chafing disk and life raft). Tighten the knot around the manifold stem. Tack knot with two turns of waxed, size 6 cord, single. Tie with ends of threads with a surgeon’s knot, followed by square knot.