AC 90-66C

Advisory circular · Non-Towered Airport Flight Operations

Approved
June 6, 2023
Last reviewed
June 7, 2023
Family
AC 90-66 · 5 versions
Revision
C
14 CFR parts
1, 91, 103

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 21, 2025.

Show pages 13–24

Appendix B B-1 APPENDIX B. GLIDER OPERATIONS Sample Glider Operations and Ultralight Aircraft Pattern Per AC 103-6, Ultralight Vehicle Operations—Air ports, Air Traffic Control, and Weather, in all radio communications, ultralight operators should state the word “ultralight” followed by the call letters. Finally, once you have completed your landing or have exited the area, it is good practice to let other aviators know that you are no longer airborne in the vicinity of the airport. For example, state, “Leesburg, Ultralight 12593U is clear of the Runway” or “Leesburg, Ultralight 12593U is 2 Miles South, Leaving the Area.”

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Appendix B Sample Glider Aircraft Pattern

GLIDER PATTERN IS INSIDE THE POWERED PATTERN ENTRY

POWERED AIRCRAFT PATTERN

GLIDER PATTERN ENTRY 600-1000' AGI EXIT TOWS TO 2000- 3000' AGL UPWIND

GLIDER OPERATING AREA

POWERED RUNWAY

GLIDER PATTERN OPPOSITE SIDE AND WIND

SEPARATE FROM POWERED RUNWAY

GLIDER OPERATING AREA GLIDER PATTERN EXIT TOWS TO 2000- 3000' AGL UPWIND

POWERED PATTERN GLIDER PATTERN ENTRY 600-1000' AGL Check the respective airport's Chart Supplement for specific information regarding glider operations. The example above is from Shirley, New York's Brookhaven Airport (KHWV).

Glider ops dalgt (daylight) hrs. Pilots be aware when conducting practice ILS apchs (approaches), extensive Igt acft (light aircraft) training on and invof arpt (in the vicinity airports) all hrs. Gliders use rgt tfc pat (right traffic pattern) for Rwy 24 and Rwy 33, gliders use left tfc pat (left traffic pattern) for Rwy 06 and Rwy 15. No TGL wkend, hol (weekend, holiday,) and non dalgt (daylight) hrs.

B-2

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Appendix C APPENDIX C. PARACHUTE OPERATIONS Per United States Parachute Association Drop Zone (DZ) dimensions

SIDE VIEW PARACHUTE OPERATIONS

- 1 MILE

PROBABLE CHUTE OPENING

EXTREME ZONE / EXTREME 3000' 1 2000° PATTERN A 1250' WINDOW 750 Y RUNWAY 13000→

TOP VIEW

- AIR TRAFFIC PATTERN - 1/2 MILE 4,000' RUNWAY

• 1 MILE 2 MILES

EXTREME

OPENING ZONE "NOTE: THIS DEPICTS AN AIRPORT

WHERE NO DROP ZONE HAS BEEN ESTABLISHED."

Example of non-towered airport Chart Supplement information: Parachute Jumping. Extensive parachute jumping activity invof arpt. (Per Chart Supplement legend, "invof" means "in the vicinity of", and "arpt" means "airport.") C-1

Advisory Circular Feedback Form If you find an error in this AC, have recommendations for improving it, or have suggestions for new items/subjects to be added, you may let us know by contacting the General Aviation and Commercial Division at 9-AFS-800-Correspondence@faa.gov or the Flight Standards Directives Management Officer at 9-AWA-AFB-120-Directives@faa.gov.

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