U.S. Department 

of Transportation 

Federal Aviation 

Administration 

DEC 1 4 2015 

Mr. Charly Gaber 

Gulfstream Aerospace LP 

P.O. Box 1036 

Airport City 

7019900, Israel 

Dear Mr. Gaber: 

Transport Airplane Directorate 

1601 Lind Avenue, S.W. 

Renton , Washington 98057-3356 

Exemption No. 1 0408A 

Regulatory Docket No. FAA-2011-0686 

This letter is to inform you that we have extended the time limit of exemption no. 10408. It 

explains the basis for our decision and describes its effect. 

The Basis for Our Decision 

By letter number FAA/ 15220/CG, dated July 30, 2015, you petitioned the Federal Aviation 

Administration (FAA), on behalf of Gulfstream Aerospace LP (GALP), for a 12-month 

extension to time-limited exemp~ion no. 10408. That exemption. from§ 25.90l(c) of 

Title 14, Code ofFederal Regulations (14 CFR), provides GALP time, which expires 

December 19, 2015, to meet limitations and conditions as described in the exemption. 

Your recent petition for an exemption extension describes circumstances requiring more 

time for GALP to achieve compliance with the limitations and conditions. The 

circumstances include changes to the full-authority digital engine control (F ADEC) software 

to address specific issues encountered during certification of the design change 

incorporating thrust-malfunction accommodation. GALP provided additional information 

regarding the F ADEC software changes in response to the high-elevation-airport 

performance issues encountered. The FAA has determined that the justification for the 

issuance of exemption no. 10408 remains valid with respect to this amendment and is in the 

public interest. GALP is incorporating the changes necessary to achieve compliance, and the 

requested extension time is appropriate for the scope of the changes. 

Your petition includes no request for substantive changes in the conditions, and reasons 

relative to public interest and safety, that were the basis for granting the original exemption. 

Federal Register Publication 

The FAA has determined that good cause exists for not publishing a summary of the petition 

in the Federal Register for public comment because the requested amendment to the 
exemption would not set a precedent, and any delay in acting on this petition would be 

detrimental to GALP 0280 fleet operations. 

Our Decision 

The FAA has determined that the justification for the issuance of exemption no. 10408 

remains valid with respect to this amendment and is in the public interest. 

Accordingly, the FAA amends condition and limitation 4, as described in The FAA 's 

Decision section of Exemption No. 10408, to read as follows: 

4. No later than December 19,2016, for all airplanes to which this exemption applies, 

GALP must: 

a. Obtain FAA approval of amended type designs incorporating thrust-malfunctionaccommodation logic that eliminates all noncompliant, uncontrollable, high-thrust 

failures, except for those due to failures within the airplane throttle system; 

2 

b. Show that all new Model 0280 production airplanes are equipped with the amended 

type designs approved to satisfy condition 4a or any subsequently approved thrustmalfunction-accommodation logic. 

The Effect of Our Decision 

All other conditions and limitations of exemption no. 10408 remain the same. This letter 

must be attached to, and is a part of, exemption no. 10408. 

Jeffrey E. Duven 

Manager, Transport Airplane Directorate 

Aircraft Certification Service