14 CFR 27.967 - Fuel tank installation.
(a) Each fuel tank must be supported so that tank loads are not concentrated on unsupported tank surfaces. In addition—
(3) If flexible tank liners are used, they must be supported so that it is not necessary for them to withstand fluid loads; and
(4) Each interior surface of tank compartments must be smooth and free of projections that could cause wear of the liner unless—
(b) Any spaces adjacent to tank surfaces must be adequately ventilated to avoid accumulation of fuel or fumes in those spaces due to minor leakage. If the tank is in a sealed compartment, ventilation may be limited to drain holes that prevent clogging and excessive pressure resulting from altitude changes. If flexible tank liners are installed, the venting arrangement for the spaces between the liner and its container must maintain the proper relationship to tank vent pressures for any expected flight condition.
(c) The location of each tank must meet the requirements of § 27.1185 (a) and (c).
(d) No rotorcraft skin immediately adjacent to a major air outlet from the engine compartment may act as the wall of the integral tank.
[Doc. No. 26352, 59 FR 50387, Oct. 3, 1994]
Title 14 published on 2015-01-01.
No entries appear in the Federal Register after this date, for 14 CFR Part 27.