---
kind: "section"
citation: "14 C.F.R. § 21.127"
title: "14"
number: "21.127"
heading: "Tests: aircraft."
url: "https://uscodex.org/cfr/14/21.127"
---

# §21.127. Tests: aircraft.

- (a) Each person manufacturing aircraft under a type certificate must establish an approved production flight test procedure and flight check-off form, and in accordance with that form, flight test each aircraft produced.
- (b) Each production flight test procedure must include the following:
  - (1) An operational check of the trim, controllability, or other flight characteristics to establish that the production aircraft has the same range and degree of control as the prototype aircraft.
  - (2) An operational check of each part or system operated by the crew while in flight to establish that, during flight, instrument readings are within normal range.
  - (3) A determination that all instruments are properly marked, and that all placards and required flight manuals are installed after flight test.
  - (4) **A check of the operational characteristics of the aircraft on the ground.**
  - (5) A check on any other items peculiar to the aircraft being tested that can best be done during the ground or flight operation of the aircraft.

## Notes

### Source

Source: Docket No. 5085, 29 FR 14568, Oct. 24, 1964, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.