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AIM 

6/17/21 

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

/

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. 

10

2

Special Operations