(3)  
substantiate that helicopter limitations, or other justifiable considerations, preclude the use of the appropriate performance criteria; and

(4)  
be approved in accordance with CAT.POL.H.305 (b).

(c)  
Notwithstanding CAT.IDE.H.240, such operations may be conducted without supplemental oxygen equipment, provided the cabin altitude does not exceed 10 000 ft for a period in excess of 30 minutes and never exceeds 13 000 ft pressure altitude.

Section 3 — Mass and balance
Chapter 1 — Motor-powered aircraft

CAT.POL.MAB.100 Mass and balance, loading
(a)  
During any phase of operation, the loading, mass and centre of gravity (CG) of the aircraft shall comply with the limitations specified in the AFM, or the operations manual if more restrictive.

(b)  
The operator shall establish the mass and the CG of any aircraft by actual weighing prior to initial entry into service and thereafter at intervals of 4 years if individual aircraft masses are used, or 9 years if fleet masses are used. The accumulated effects of modifications and repairs on the mass and balance shall be accounted for and properly documented. Aircraft shall be reweighed if the effect of modifications on the mass and balance is not accurately known.

(c)  
The weighing shall be accomplished by the manufacturer of the aircraft or by an approved maintenance organisation.

(d)  
The operator shall determine the mass of all operating items and crew members included in the aircraft dry operating mass by weighing or by using standard masses. The influence of their position on the aircraft’s CG shall be determined.

(e)  
The operator shall establish the mass of the traffic load, including any ballast, by actual weighing or by determining the mass of the traffic load in accordance with standard passenger and baggage masses.

(f)  
In addition to standard masses for passengers and checked baggage, the operator can use standard masses for other load items, if it demonstrates to the competent authority that these items have the same mass or that their masses are within specified tolerances.

(g)  
The operator shall determine the mass of the fuel load by using the actual density or, if not known, the density calculated in accordance with a method specified in the operations manual.

(h)  
The operator shall ensure that the loading of:

(1)  
its aircraft is performed under the supervision of qualified personnel; and

(2)  
traffic load is consistent with the data used for the calculation of the aircraft mass and balance.

(i)  
The operator shall comply with additional structural limits such as the floor strength limitations, the maximum load per running metre, the maximum mass per cargo compartment and the maximum seating limit. For helicopters, in addition, the operator shall take account of in-flight changes in loading.
　
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本文鏈接地址：Annexes to the draft Commission Regulation on ‘Air Operations - OPS’(119)