Shawn David 

Director – Fleet Engineering 

September 19, 2012

Mr. Brian Cooper 

Principal Avionics Inspector 

1187 Thorn Run Road, Suite 200 

Coraopolis, PA 15108 

US Airways 

4000 E. Sky Harbor Blvd. 

Phoenix, AZ 85034 

480-693-7254 

Attachments: Airbus Petition Letter for Exemption; reference SA31M12009739 

 Airbus Operator Information Transmission 999.0046/12 

References: United States of America Department of Transportation Federal 

 Aviation Administration FAA Regulatory Docket No. FAA-2012-0429 

Subject 

US Airways seek an exemption from 14 CFR 121.344(f) Appendix M, Parameter 68: 

Brake Pressure Left and Right, Recording Frequency for certain Airbus A320-Family 

aircraft.

Condition

On April 3, 2012, Airbus contacted the FAA on behalf of N-registered operators to 

inform the FAA of a discrepancy in the recording rate of the left and right brake pressure 

in the Digital Flight Data Recorder system and to request an exemption until a technical 

solution is available. As directed by 14 CFR 121.344 Appendix M, parameter 68, the left 

and right applied brake pressure must be sampled once every second and recorded to the 

DFDR. 

On June 5, 2012, Airbus notified operators via Airbus Operators Information 

Transmission 999.0046/12 of the recording frequency discrepancy with respect to 14 

CFR 121.344 Appendix M, parameter 68, Brake Pressure Left and Right. Presently, 

affected Airbus A320-family aircraft do not record the left and right brake pressure on the 

Digital Flight Data Recorder system at the rate of one sample per second as required by 

121.344 Appendix M. 

On August 28, 2012, the Airbus petition for exemption was entered in Federal Docket 

FAA-2012-0429 and granted as Exemption No. 10611. 

Pittsburgh International Airport, P.O. Box 12346, HG3/ENT, Pittsburgh, PA 15231-0346 (412) 538-3820 Fax (412) 538-3811 

Mr.Brian Cooper 

September 19, 2012 

Page 3

US Airways affected A320-family aircraft: 

Registration MSN FDIMU Software Aircraft Model 

N125UW 4086 360-04027-030 A320-214 

N126UW 4149 360-04027-030 A320-214 

N127UW 4202 360-04027-030 A320-214 

N128UW 4242 360-04027-030 A320-214 

N193UW 3584 360-04027-030 A321-211 

N194UW 3629 360-04027-030 A321-211 

N195UW 2633 360-04027-030 A321-211 

N196UW 2879 360-04027-030 A321-211 

N197UW 2925 360-04027-030 A321-211 

N507AY 3712 360-04027-030 A321-231 

N508AY 3740 360-04027-030 A321-231 

N509AY 3796 360-04027-030 A321-231 

N510UW 3858 360-04027-030 A321-231 

N519UW 3881 360-04027-030 A321-231 

N520UW 3924 360-04027-030 A321-231 

N521UW 3944 360-04027-030 A321-231 

N523UW 3960 360-04027-030 A321-231 

N524UW 3977 360-04027-030 A321-231 

N534UW 3989 360-04027-030 A321-231 

N535UW 3993 360-04027-030 A321-231 

N536UW 4025 360-04027-030 A321-231 

N537UW 4041 360-04027-030 A321-231 

N538UW 4050 360-04027-030 A321-231 

N539UW 4082 360-04027-030 A321-231 

N540UW 4107 360-04027-030 A321-231 

N541UW 4123 360-04027-030 A321-231 

N542UW 4134 360-04027-030 A321-231 

N601AW 1935 360-04027-020 A320-232 

N672AW 2193 360-04027-020 A320-232 

N673AW 2312 360-04027-020 A320-232 

N675AW 2405 360-04027-020 A320-232 

N676AW 2422 360-04027-020 A320-232 

N677AW 2430 360-04027-020 A320-232 

N678AW 2482 360-04027-020 A320-232 

N679AW 2613 360-04027-020 A320-232 

N680AW 2630 360-04027-020 A320-232 

N833AW 1844 360-04027-020 A319-132 

N834AW 2302 360-04027-020 A319-132 

N835AW 2458 360-04027-020 A319-132 

N836AW 2570 360-04027-020 A319-132 

N837AW 2595 360-04027-020 A319-132 

N838AW 2615 360-04027-020 A319-132 

N839AW 2669 360-04027-020 A319-132 

N840AW 2690 360-04027-020 A319-132