---
kind: "section"
citation: "14 C.F.R. § 135.158"
title: "14"
number: "135.158"
heading: "Pitot heat indication systems."
url: "https://uscodex.org/cfr/14/135.158"
---

# §135.158. Pitot heat indication systems.

- (a) Except as provided in [paragraph (b)](#b) of this section, after April 12, 1981, no person may operate a transport category airplane equipped with a flight instrument pitot heating system unless the airplane is also equipped with an operable pitot heat indication system that complies with [§ 25.1326](/cfr/14/25.1326.md) of this chapter in effect on April 12, 1978.
- (b) A certificate holder may obtain an extension of the April 12, 1981, compliance date specified in [paragraph (a)](#a) of this section, but not beyond April 12, 1983, from the Executive Director, Flight Standards Service if the certificate holder—
  - (1) Shows that due to circumstances beyond its control it cannot comply by the specified compliance date; and
  - (2) Submits by the specified compliance date a schedule for compliance, acceptable to the Executive Director, indicating that compliance will be achieved at the earliest practicable date.

## Notes

### Amendments

[Docket 18094, Amdt. 135-17, 46 FR 48306, Aug. 31, 1981, as amended by Amdt. 135-33, 54 FR 39294, Sept. 25, 1989; Docket FAA-2018-0119, Amdt. 135-139, 83 FR 9175, Mar. 5, 2018]

### Authority

Authority: 49 U.S.C. 106(f), 40113, 41706, 44701-44702, 44705, 44709, 44711-44713, 44715-44717, 44722, 44730, 45101-45105; Pub. L. 112-95, 126 Stat. 58 (49 U.S.C. 44730).

### Source

Source: Docket 16097, 43 FR 46783, Oct. 10, 1978, unless otherwise noted.

### Amendments

[Docket 18094, Amdt. 135-17, 46 FR 48306, Aug. 31, 1981, as amended by Amdt. 135-33, 54 FR 39294, Sept. 25, 1989; Docket FAA-2018-0119, Amdt. 135-139, 83 FR 9175, Mar. 5, 2018]