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AIM

10/12/17

10−2−6

Special Operations

NOTE−

It is recommended that communications be established a

minimum of 10 minutes prior to planned arrival time. This

practice may be a requirement of some offshore

owner/operators.
NOTE−

1. See subparagraph 10−2−1d for Tanker Operations.
2. Private use Heliport. Offshore heliports are privately
owned/operated facilities and their use is limited to
persons having prior authorization to utilize the facility.

l. Two (2) Helicopter Operations on Offshore

Helidecks

1. Background. Standardized procedures can

enhance the safety of operating a second helicopter

on an offshore helideck, enabling pilots to

determine/maintain minimum operational parame-

ters. Orientation of the parked helicopter on the

helideck, wind and other factors may prohibit

multi−helicopter operations. More conservative

Rotor Diameter (RD) clearances may be required

under differing condition, i.e., temperature, wet deck,

wind (velocity/direction/gusts), obstacles, approach/

departure angles, etc. Operations are at the pilot’s

discretion.

2. Recommended Practice. Helideck size,

structural weight capability, and type of main rotor on

the parked and operating helicopter will aid in

determining accessibility by a second helicopter.

Pilots should determine that multi−helicopter deck

operations are permitted by the helideck owner/

operator.

3. Recommended Criteria

(a) Minimum one−third rotor diameter

clearance (

1

/

3

 RD). The landing helicopter main-

tains a minimum 

1

/

3

 RD clearance between the tips of

its turning rotor and the closest part of a parked and

secured helicopter (rotors stopped and tied down).

(b) Three foot parking distance from deck

edge (3’). Helicopters operating on an offshore

helideck land or park the helicopter with a skid/wheel

assembly no closer than 3 feet from helideck edge.

(c) Tiedowns. Main rotors on all helicopters

that are shut down be properly secured (tied down) to

prevent the rotor blades from turning.

(d) Medium (transport) and larger helicopters

should not land on any offshore helideck where a light

helicopter is parked unless the light helicopter is

property secured to the helideck and has main rotor

tied down.

(e) Helideck owners/operators should ensure

that the helideck has a serviceable anti−skid surface.

4. Weight and limitations markings on

helideck. The helideck weight limitations should be

displayed by markings visible to the pilot (see State

of Louisiana “Offshore Heliport Design Guide” and

FAA AC 150/5390−2A, Heliport Design Guide).

NOTE−

Some offshore helideck owners/operators have restrictions

on the number of helicopters allowed on a helideck. When

helideck size permits, multiple (more than two) helicopter

operations are permitted by some operators.

m. Helicopter Rapid Refueling Procedures

(HRR)

1. Background. Helicopter Rapid Refueling

(HRR), engine(s)/rotors operating, can be conducted

safely when utilizing trained personnel and observing

safe practices. This recommended practice provides

minimum guidance for HRR as outlined in National

Fire Protection Association (NFPA) and industry

practices. For detailed guidance, please refer to

National Fire Protection Association (NFPA) Docu-

ment  407, “Standard for Aircraft Fuel Servicing,”

1990 edition, including 1993 HRR Amendment.

NOTE−

Certain operators prohibit HRR, or “hot refueling,” or

may have specific procedures for certain aircraft or

refueling locations. See the General Operations Manual

and/or Operations Specifications to determine the

applicable procedures or limitations.

2. Recommended Practices

(a) Only turbine−engine helicopters fueled

with JET A or JET A−1 with fueling ports located

below any engine exhausts may be fueled while an

onboard engine(s) is (are) operating.

(b) Helicopter fueling while an onboard

engine(s) is (are) operating should only be conducted

under the following conditions:

(1) A properly certificated and current pilot

is at the controls and a trained refueler attending the

fuel nozzle during the entire fuel servicing process.

The pilot monitors the fuel quantity and signals the

refueler when quantity is reached.