Chevron USA 96 Runway Road 

Picayune, MS 39466 

June 24, 2015 Ref. No. 214-1111 

Docket Management Facility 

US Department of Transportation 

1200 New Jersey Avenue 

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 

Operations for an exemption for the AW139 to operate CAT A from smaller than 50'x50' 

helideck. The requested exemption, if granted, would allow us to operate Augusta 

AW139 helicopters with limited exposure from an engine failure during takeoff and 

landing between land-based and offshore facilities or when operating between two 

offshore facilities, day, night, visual flight rules, and instrument flight rules. 

Specifically, we are requesting relief from Supplement 12 and 50, CAT A Helideck Size 

of the Rotorcraft Flight Manual and to operate Performance Class 2 (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 operate to a CAT A standard profile and 

performance, at a reduced helideck size and to sea state 5. Chevron's AW139's are 

equipped with aircraft floatation gear and are certified for ditching in up to sea state 5. 

European operators, using the same aircraft, operate the AW139 in accordance with 

Joint Aviation Requirement-OPS-3 (sec. 9 Supplemental Performance, Performance 

Class) which already permits similar operations to smaller helidecks with limited 

exposure to engine failure. 
Chevron AW139 Operations will operate lAW the profiles and procedures of The 

Chevron Vol II, AW139 Standardization Manual: 

• Onshore departures will operate CAT A profiles and procedures 

• Offshore Departures will operate CAT A profiles,;and procedures 

• Offshore TOP is 20' above the helideck with a RP (rotate point) of 30' 

(This height will maintain helideck in view until reaching TOP) 

• Onshore landings will operate CAT A profiles and procedures 

• Offshore landings will operate CAT A profiles and procedures 

• Offshore LOP is 50'ALS (above landing surface), 15kts GS, and 45° from center 

of helideck 

(This position allows crew to fly away or land OEI) 

All flight crews will evaluate helicopter performance, payload, temperature, 

pressure altitude and winds before every flight and then to fly disciplined CAT A 

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 

proficiency and competency for CAT A 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 ensure flight 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 

safety that is currently in place for our offshore 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 AC2A685K for Part 135 Operations, 

Repair Station Certificate AC2R685K. Chevron operates the AW139 FAR Part 91. 

Chevron Aircraft Operations can provide engine data for the 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 of further assistance in this matter or if you require additional information, 

please do not hesitate to 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. 

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/KevinTauzier · 

Diredor of Operations 

Chevron Aircraft Operations 

Office: 601-749-4022 

Cel!: 601-569-0428 

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