### Chevron USA 96 Runway Road Picayune, MS 39466

June 24, 2015 Ref. No. 214-1111 Docket Management Facility US Departmentof Transportation 1200 NewJerseyAvenue SE West Building Ground Floor Room W12-140 Washington, DC 20590 Dear Sir,**~-** .... ·. · ..'

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I am petitioning the Federal Aviation Administration (FAA) on behalf of Chevron Aircraft Operationsfor an exemption forthe AW139 to operate CATA from smallerthan 50'x50' helideck. The requested exemption, if granted, would allow usto operateAugusta AW139 helicopterswith limited exposurefrom an enginefailure during takeoff and landing between land-based and offshorefacilities orwhen operating between two offshore facilities, day, night, visual flight rules, and instrumentflight rules. Specifically, we are requesting relieffrom Supplement 12 and 50, CATA Helideck Size ofthe Rotorcraft Flight Manual and to operate Performance Class2 (PC2). Supplement 12 (pg. S12-17) and Supplement 50 (pg. S50-4) prescribes, in part, the heliport/ helideck minimum size limitation of a 50'x 50' helideck. PC2 (Sec 9 pg. 9-129) allows Chevron to operateto a CATA standard profile and performance, ata reduced helidecksize and to sea state 5. Chevron's AW139's are equipped with aircraftfloatation gearand are certifiedfor ditching in upto sea state 5. European operators, using the same aircraft, operatethe AW139 in accordancewith JointAviation Requirement-OPS-3 (sec. 9 Supplemental Performance, Performance Class) which already permits similar operationsto smaller helideckswith limited exposure to engine failure.Chevron AW139 Operationswill operate lAW the profiles and procedures of The Chevron Vol II, AW139 Standardization Manual:

• Onshore departures will operate CATA profiles and procedures • Offshore Departures will operate CATA profiles,;and procedures • Offshore TOP is 20' above the helideckwith a RP (rotate point) of 30' (This heightwill maintain helideck in view until reaching TOP) • Onshore landings will operate CATA profiles and procedures • Offshore landings will operate CATA profiles and procedures • Offshore LOP is 50'ALS (above landing surface), 15kts GS, and 45° from center of helideck (This position allows crewto fly awayor land OEI) All flight crews will evaluate helicopter performance, payload, temperature, pressure altitude and winds before everyflight and then to fly disciplined CATA takeoff and landing profiles that minimize the potential consequences of engine failure. Chevron Aircraft Operations will further mitigate exposure by: (1) Conducting flight operations to and from helidecks and shore based heliports that meet size and weight requirements appropriate to the aircraft configuration; (2) Training its crews in a Level D, FFS (Full Flight Simulator) initially and annually, ensuring the highest levels of proficiencyand competencyfor CATA profiles and procedures for onshore and offshore settings in AEO and OEI operations; (3) Conducting route checks to confirm that its crews remain procedurally compliant and use crew resource management principles during all flight operations; and (4) Using Chevron Aircraft Operations Helicopter Flight Data Monitoring program to ensureflight profiles are in accordance with Chevron VOL II, AW139 Standardization Manual.. We believe that the requested exemption will continue to provide the same level of safetythat is currently in place for ouroffshore operations. To date Chevron Aircraft Operations established in the 1940's, operates from land to offshore platform helidecks using several different model aircraft. Chevron Aircraft Operations currently holds Air Carrier Certificate AC2A685Kfor Part 135 Operations, Repair Station Certificate AC2R685K. Chevron operates the AW139 FAR Part 91. Chevron Aircraft Operations can provide engine dataforthe AW139. Chevron Aircraft Operations has operated ten AW139's for 10 years from land to offshore helidecks and has accumulated over 40,000 safe AW139 flight hours.If I may be offurther assistance in this matter or if you require additional information, please do not hesitateto contact me or the Chevron Aircraft Operations Gulf of Mexico Business Unit, office located in Picayune Ms. My email is ktauzier@chevron.com. If

### you:z~e rr'y q €Stions regarding this request please don't hesitate to call. j//

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/KevinTauzier · DiredorofOperations Chevron AircraftOperations Office: 601-749-4022 Cel!: 601-569-0428

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