76-23-02 ROCKWELL: Amendment 39-2770. Applies to Model 114, S/N's 14089 through 14113, 14115 through 14122, 14125 through 14131, 14134 through 14149, 14152 through 14154, and 14156 through 14158.
Compliance required as indicated after receipt of this AD.
1. Within 10 hours after the effective date of this AD, unless already accomplished, modify the forward cabin vent valve and air ducts in accordance with Rockwell Service Bulletin No. SB-114-6 dated November 1, 1976, or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration, Fort Worth, Texas.
2. Until compliance with paragraph 1 above is accomplished, the following operating procedure is required:
While climbing, the two vent valves located near the floor, below and outboard of the front seat passenger's leg must be in the full open position (allowing hot or cold air to pass from the duct into the passenger compartment). Also the cabin heat and/or the cabin vent knobs located on the lower instrument panel just to the right of the center console must be in the full open position (pulled out to stop).
Operation in taxi, cruise, or glide is exempt from these restrictions.
This amendment is effective November 26, 1976, and was effective upon receipt for all recipients of the letter dated November 5, 1976, which contained this amendment.