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Atlas / TCDS / 4H10

FAA · Type Certificate Data Sheet

TCDS 4H10

Siam Hiller Holdings Inc.

Current Aircraft Rotorcraft Rev 7 10/28/2014 drs.faa.gov ↗

Models covered (1)

Former holders

  • Hiller Aviation

Fleet view · 30 registered tails

Engineering specs aggregated from the FAA Aircraft Registry — what every actually-flying tail under this TCDS reports. Median + 10th–90th-percentile range across the active fleet.

Seats

4

n=30

Horsepower

260

175–300

Cruise (kts)

75

75–75

Year of mfr

1959

1957–1976

Engines on the type, by tail count

  • LYCOMING VO-435 SERIES 12
  • LYCOMING 0-435 3
  • ALLISON 250 SERIES 2
  • NONE NONE 1
  • ROLLS-ROYC 250-C20B 1

NTSB events

8

across all model variants

Applicable ADs

6

FAA airworthiness directives

Per-tail rate

0.27 events / tail · 0.20 ADs / tail

The TCDS PDF on drs.faa.gov is the authoritative document for design-as-certified weight limits, performance, equipment, AD compliance times, and operating limitations. Open on drs.faa.gov ↗ DRS frequently breaks — when it does, the fleet view above and the cross-links below are usually what you actually need.