161991
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Flight activity
(26 tracking legs recorded)- Last 30 days
- 8
- Last 90 days
- 26
- Last seen
- 28 Oct 2026
- Tracked since
- 28 Aug 2026
Frequent routes: KNKX → KNKX (19)
- KNKX → KNKX28 Oct 2026 · 0h 56m
- KNKX → KNKX28 Oct 2026 · 0h 16m
- KNKX → KNKX28 Oct 2026 · 0h 14m
- KNKX → KNKX7 Oct 2026 · 1h 40m
- KNKX → KNKX7 Oct 2026 · 0h 05m
- KNKX → KNKX7 Oct 2026 · 0h 21m
- KNKX → KNKX10 Sept 2026 · 2h 49m
- KNKX → KNKX1 Sept 2026 · 0h 35m
- KNKX → KNKX1 Sept 2026 · 0h 07m
- KNKX → KNKX28 Aug 2026 · 0h 30m
Showing the 10 most recent distinct flights. The total counts every raw ADS-B tracking leg, including repeat observations and sub-5-minute artifacts.
From ADS-B observations collected since May 2026. Coverage depends on ground-receiver density; gaps do not mean the aircraft did not fly.
Common. More common than 81% of the aircraft models we track.
Other CH-53 airframes by tail number — same model as 161991.
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Registration history
(1)- 161991USACTIVEUnknown owner—
Owner names are published by the issuing civil registry (FAA / CCARCS / CASA / ANAC / NZ CAA). Owner addresses present in the source are not republished here. Registered owner? Request removal
What aircraft model is 161991?
161991 is a Sikorsky CH-53. Sprinkle's record for 161991 covers its lineage, ownership history and specifications.
Is 161991 currently active?
Registry records list 161991's status as Active, registered in United States — a Sikorsky CH-53.
What is the ICAO24 / Mode S code for 161991?
161991's ICAO24 (Mode S) transponder code is AE4B4C — the hex address the Mode S transponder on this Sikorsky CH-53 broadcasts.