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Exemption No. 10078 

UNITED STATES OF AMERICA 

DEPARTMENT OF TRANSPORTATION 

FEDERAL AVIATION ADMINISTRATION 

WASHINGTON, DC 20591 

In the matter of the petition of 

HAWKER BEECHCRAFT CORPORATION 

for an exemption from § 23.783(f)(1) 

of Title 14, Code of 

Federal Regulations 

Regulatory Docket No. FAA-2010-0216 

GRANT OF EXEMPTION 

By letter dated February 16,2010, Mr. David Bemstorf, Vice President Safety and 

Certification, Hawker Beechcraft Coiporation, 9709 Central, P.O. Box 85, Wichita, KS, 

67201-0085 petitioned the Federal Aviation Administration (FAA) on behalf of Hawker 

Beechcraft Corporation for an exemption from § 23.783(f)(1) of Title 14, Code of Federal 

Regulations (14 CFR). The proposed exemption, if granted, would allow the certification of 

the model 390-2 with a main door width less than that specified in 14 CFR part 23. 

The petitioner requests relief from the following regulation: 

Section 23,783(f)(1) prescribes, in pertinent part, that each passenger entry door must 

qualify as a floor level emergency exit and have a rectangular opening with a width not 

less than 24 inches. 

The petitioner supports its request vyith the following information: 

"HBC [Hawker Beechcraft Corporation] requests an exemption to the requirements 

outlined above for the Hawker Beechcraft model 390-2. 

"The model 390-2 entry door has bjisic dimensions greater than the minimum required 

by 14 CFR § 23.783(f)(1), The total area of the model 390-2 cabin door opening minus 

the area occupied by localized projections is greater than the minimum area required by 

14 CFR § 23.783(f)( 1); however, the minimum width dimension cannot be met at 

discrete points due to the protrusions. 

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"HBC will conduct an egress test per 14 CFR § 23.803. The egress test will demonstrate 

the 390-2 entryway dimensions provide enough open area as to allow safe exit of the 

airplane. Service history has been reviewed and no issues have been shown with the 

cabin door evacuation due to the protrusions for the model 390 in any 

accidents/incidents where egress was demonstrated. 

"HBC proposes that an exemption be based on the model 390-2 entry door's basic 

dimensions and open area in excess of the minimum required by 14 CFR § 23.783(f)(1) 

and on the successful demonstration of egress." 

A summary of the petition was published in the Federal Register on April 9, 2010 

(75 FR 18256). No comments were received. 

The FAA's analysis is as follows: 

The FAA finds that the door and niaximum occupancy are unchanged from the earlier 

model 390 and service history indicates there has been no issue with emergency evacuation 

for the maximum eight occupants. Tlierefore, we find that this exemption will not adversely 

affect safety and will provide a level of safety equivalent to the regulation. 

The FAA's Decision 

In consideration of the foregoing, 1 find that a grant of exemption is in the public 

interest. Therefore, pursuant to the authority contained in 49 U.S.C. §§ 40113 and 44701, 

delegated to me by the Administrator, Hawker Beechcraft Corporation is granted an 

exemption from 14 CFR § 23.781(f)(1) to the extent necessary to allow Hawker Beechcraft 

Corporation to certify the model 390-2 in the commuter category, subject to the conditions 

and limitations listed below. 
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Conditions and Limitations 

1. Passenger briefing cards will be on board to explain the operation of the exit. 

2. Occupancy of the airplane is restricted to maximum 2 crew seats and 6 passenger 

seats. 

Issued in Kansas City, Missouri on June ID, 2010. 

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S t*VeT:hotnp son 

Acting Manager, Small Airplane Directorate 

Aircraft Certification Service