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 Departme nt of Transportation Federal Aviation Administra tion 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 recordin g 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 sa mpled 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 freq uency 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 r ecord the left and right brake pressure on the Digital Flight Data Recorder system at the rate of one sample pe r second as required by 121.344 Appendix M.

On August 28, 2012, the Airbus petition for ex emption was entered in Federal Docket FAA-2012-0429 and granted as Exemption No. 10611.

Pittsburgh International Airport, P.O. Bo x 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