Air carrier first officer reported ambiguous company noise abatement procedures into jackson hole ai...

Narrative:

During approach into jac to runway 19; under VMC conditions; cleared for the visual approach; captain flew left of course to comply with the noise abatement of the moose lodge. As were just prior to abeam the lodge we got the GPWS warning for terrain. I believe the primary reason was a slightly closer path to the terrain to the left and slightly low. At no time were we in jeopardy of hitting the terrain in the VMC conditions and airport in sight. Continued approach with a right turn abeam the lodge to align with the runway.I truly believe there is so much emphasis on avoiding the moose lodge that it causes pilots to take a path that places them closer than necessary to the terrain to the east of the lodge. There is no stipulation on how far is far enough. We have no idea what the noise levels are at what distance/altitude. Also there is such a fear factor in all the chart info and company airport data that on a clear; dry-runway-condition day pilots tend to make a shallower approach path to the runway. I guess the thinking is that we must land by the PAPI so if I am lower it will help; instead of making a normal approach and only 'dipping' below the glide path in the last 500 ft or so. Having flown into jac numerous times in the last 3 months I have learned that way too much fear is imparted when the runway is dry and winds are favorable.

Original NASA ASRS Text

Title: Air carrier First Officer reported ambiguous company noise abatement procedures into Jackson Hole airport require flying off course during approach to comply.

Narrative: During approach into JAC to runway 19; under VMC conditions; cleared for the visual approach; Captain flew left of course to comply with the noise abatement of the Moose Lodge. As were just prior to abeam the lodge we got the GPWS warning for terrain. I believe the primary reason was a slightly closer path to the terrain to the left and slightly low. At no time were we in jeopardy of hitting the terrain in the VMC conditions and airport in sight. Continued approach with a right turn abeam the lodge to align with the runway.I truly believe there is so much emphasis on avoiding the Moose Lodge that it causes pilots to take a path that places them closer than necessary to the terrain to the east of the Lodge. There is no stipulation on how far is far enough. We have no idea what the noise levels are at what distance/altitude. Also there is such a fear factor in all the chart info and company airport data that on a clear; dry-runway-condition day pilots tend to make a shallower approach path to the runway. I guess the thinking is that we must land by the PAPI so if I am lower it will help; instead of making a normal approach and only 'dipping' below the glide path in the last 500 ft or so. Having flown into JAC numerous times in the last 3 months I have learned that way too much fear is imparted when the runway is dry and winds are favorable.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1582793
Time
Date	201809
Local Time Of Day	1201-1800
Place
Locale Reference	JAC.Airport
State Reference	WY
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

Air carrier first officer reported ambiguous company noise abatement procedures into jackson hole airport require flying off course during approach to comply.