External Load Operations

Question 1

External Load Operations:

Reference:

Answer 1

Three external cargo hooks are provided for attaching external cargo. The hooks can be used with a single load on one hook, two hooks in tandem (forward and aft hooks), or individual loads on three hooks. The tandem hook configuration provides improved load stability at higher
airspeeds.

Reference: TM 1-1520-271-10 Ch. 4

Question 2

All hooks have _____ _______ modes, ______ _____ modes, and ______ ______ modes.

Answer 2

All hooks have normal release modes, emergency release modes, and manual release modes.

Normal release mode can be controlled by both pilots or by the hoist operator.

Emergency release of all hooks can be performed electrically by either pilot or manually by the crew member.

Question 3

The position of the center cargo hook is such that the load is suspended beneath the __ of the helicopter at STA ______.

Answer 3

The position of the center cargo hook is such that the load is suspended beneath the CG of the helicopter at STA 331.00

Question 4

In the event of a loss in utility system pressure, the cargo hook can be opened ______ or ______.

Answer 4

In the event of a loss in utility system pressure, the cargo hook can be opened pneumatically or manually.

Question 5

The forward and aft cargo hooks are attached to the bottom centerline of the helicopter at STA _____ and _____

Answer 5

The forward and aft cargo hooks are attached to the bottom centerline of the helicopter at STA 249.00 and 409.00

Question 6

FWD and AFT Hook release mechanism

Answer 6

Both hooks have electrical normal and emergency release mechanisms.

Question 7

Advisory marked FWD HOOK LOAD and AFT HOOK LOAD will be displayed on the MFD when the hook load exceeds approximately ___ pounds.

Answer 7

Advisory marked FWD HOOK LOAD and AFT HOOK LOAD will be displayed on the MFD when the hook load exceeds approximately 150 pounds.

Question 8

The forward and aft hooks may fail to open if the slings are slack when the release solenoids are energized (a load of approximately __ pounds is required for opening).

Answer 8

The forward and aft hooks may fail to open if the slings are slack when the release solenoids are energized (a load of approximately 20 pounds is required for opening).

Question 9

The cargo hook control can be operated from the cockpit by __________ and ________.

Answer 9

The cargo hook control can be operated from the cockpit by a switch on each cyclic stick grip and switches on the overhead panel.

Question 10

External loads must not be rigged entirely with ______ slings.

Answer 10

External loads must not be rigged entirely with steel cable (wire rope) slings.

Question 11

To dampen vibration tendencies, a _____ at least _____ must be placed between the steel cable sling and the nylon loop or metal shackle which attaches to the cargo hook.

Answer 11

To dampen vibration tendencies, a nylon vertical riser at least 6 feet long must be placed between the steel cable sling and the nylon loop or metal shackle which attaches to the cargo hook.

Question 12

Types of External Loads:

Reference:

Answer 12

Low Density Loads
High Density Loads
Aerodynamic Loads
*Multi-Hook Loads

Reference: TM 1-1520-271-10-2 Ch. 8

Question 13

Low Density Loads:

Answer 13

Low Density Loads:

When carrying low density loads, airspeed is limited by the amount of clearance which can be maintained between the load and the underside of the
helicopter.

Question 14

High Density Loads:

Answer 14

High Density Loads:

High density loads can usually be flown at cruise airspeed and in some cases up to Vne.

Question 15

Aerodynamic Loads:

Answer 15

Aerodynamic Loads:

Have certain inherent dangers because of their aerodynamic lift capabilities. Therefore, the lift capabilities of external loads must be eliminated before
they are lifted.

Question 16

Multi-Hook Loads:

Answer 16

Multi-Hook Loads:

Handling characteristics are improved when loads are slung using two-point (forward and aft hook) sling suspension. Load motion is substantially reduced.

Question 17

Classification Definitions of Sling Loads:

Answer 17

● Certified Sling Loads: Certified sling loads are those items of equipment and their
associated rigging procedures which have completed the evaluation and testing
required by the US Army Natick Soldier Center (NSC) for sling load certification.

● Suitable Sling Loads: Suitable sling loads are those items of equipment and their
associated rigging procedures that have not been certified but have demonstrated
acceptable static lift and flight characteristics during a flight test (known loads which
have been flown without incident for years and which NSC considers to be proven safe).

● Unique Sling Loads. Unique loads are equipment carried on a one time or low-frequency
basis, such as telephone poles, artillery targets, or barrier material. The movement of
unique loads should be approved by the high risk approving authority.

● Prohibited Sling Loads: Prohibited sling loads are items of equipment that are prohibited
from sling loading as determined by each service.

Question 18

___________ must be discharged in all helicopters prior to connecting a cargo sling or net to the aircraft’s hook, except when using a ________, even when insulated lineman gloves are worn.

Answer 18

Static electricity must be discharged in all helicopters prior to connecting a cargo sling or net to the aircraft’s hook, except when using a reach pendant, even when insulated lineman gloves are worn.

Question 19

Reach Pendants:

Answer 19

A reach pendant is a synthetic rope assembly with an attached stiffened reach
tube and a loop on each end. The built-in reach tube enables the hookup man to place the
pendant’s top eye on the helicopter cargo hook while the helicopter hovers at a higher distance over the load. If the load spins more than 360° the strength of the reach pendant weakens and the lift should be stopped immediately.

Question 20

Sling Load Inspection Record:

Answer 20

All Army loads will require an inspection by a qualified inspector prior to the arrival of the supporting aircraft using the Sling Load Inspection Record DA Form 7382. Inspectors must be E4 or above and a graduate of Pathfinder, Air Assault, or Sling Load
Inspector Certification.

Question 21

TM 4-48.10

Answer 21

Multiservice Helicopter Sling Load: Single-Point Load Rigging Procedures

Question 22

Multiservice Helicopter Sling Load: Single-Point Load Rigging Procedures

Answer 22

TM 4-48.10

Question 23

TM 4-48.11

Answer 23

Multiservice Helicopter Sling Load: Dual-Point Load Rigging Procedures

Question 24

Multiservice Helicopter Sling Load: Dual-Point Load Rigging Procedures

Answer 24

TM 4-48.11

Question 25

Reference

Answer 25

Reference: TM 4-48.09