AD 72-11-02

72-11-02 BEECH: Amdt. 39-1449. Applies to the following airplanes:

1970 and after Bonanza Models Serial Numbers F33 and G33 CD-1235 through CD- 1276 F33A CE-290 through CE-366 V35B and V35B-TC D-906 through D-9319 A36 E-185 through E-310

1970 and after Baron Model Serial Numbers 95-B55 and 95-B55A TC-1383 thru TC-1425 w/25-Gal. Cells TC-1299 thru TC-1425 w/40-Gal. Cells 95-B55B TF-66 through TF-70 E55 and E55A TE-768 through TE-851 58 and 58A TH-1 through TH-200

1959 to 1969 Bonanza & Debonair Models Serial Numbers 35-33, 35-A33, 35-B33, 35-C33 and E33 CD-1 through CD-1234 35-C33A and E33A CE-1 through CE-289 E33C and F33C CJ-1 through CJ-30 K35, M35, N35, P35, S35, V35, V35-TC, V35A and V35A-TC D-5726 through D-9068 36 E-1 through E-184

1958 and before Bonanza Models Serial Numbers 35, 35R, A35, B35, C35, D35, D-1 through D-5725, E35, F35, G35, H35, J35 D-15001 and D-15002

1969 and before Baron & Travel Air Models Serial Numbers 95-55, 95-A55, 95-B55 and 95-B55A TC-1 thru TC-1382 w/25 Ga. Cells TC-1 thru TC-1298 w/40 Gal. Cells 95-B55B TF-1 through TF-65 95-C55, 95-C55A, D55 and D55A TE-1 through TE-767 95, B95, B95A, D95A and E95 TD-1 through TD-721

Compliance: Within 50 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent engine fuel interruption during critical aircraft maneuvers:

A) For those Beech Bonanza and Baron 1970 models and after airplanes listed herein, accomplish the following in accordance with Beech Service Instructions 0491-281 or later revision, or with Beech Service Instructions 0484-281 or later revision, as applicable:

1) Inspect all Goodyear baffled main fuel cells equipped with metal check valves to determine that the flapper element moves through its full travel without binding and seats properly. Adjust or replace the flapper element of the valve as required.

2) Inspect Uniroyal baffled main fuel cells for leaks in the area of the relief cutouts in the fuel cell baffles and repair if required.

3) a) Install a yellow band on the outside of the glass on each main fuel quantity gage. The yellow band should extend from the empty to the 1/2 full gage markings on airplanes with 25 gallon main fuel cells and to the 3/8 gage marking on single engine airplanes with 40 gallon main fuel cells. On single engine models equipped with vertical type engine gage, install a yellow band on the fuel gage from 0-80 pounds and install a new full mark at the top of the gage. Add yellow band from empty to 1/4 gage marking on Baron model airplanes with 39 or 40 gallon fuel cells, except that on Baron Models 58 and 58A airplanes add yellow band from empty to 1/8 gage markings.

b) Install a placard on the fuel selector cover or floating instrument panel in full view of the pilot with the following wording: "Do not take off if fuel gages indicate in the yellow band or with less than 13 gallons in each main tank", and operate the airplane in accordance with this limitation.

c) Change the left hand and right hand tank capacities on the fuel selector panel as follows:

1) to 22 gallons on airplanes equipped with 25 gallon main fuel cells,

2) to 37 gallons on airplanes equipped with 39 or 40 gallon main fuel cells,

3) to 70 gallons on Models 58 and 58A airplanes equipped with standard fuel system, and

4) to 83 gallons on Models 58 and 58A airplanes equipped with 84 gallon optional fuel system.

Also, change the main fuel cell filler capacity marking on each wing to indicate the above capacities.

d) Adjust the existing weight and balance information for each airplane to compensate for the increase in the amount of unusable fuel.

e) As applicable, attach the appropriate Airplane Flight Manual Supplement to the AFM or install the revised Pilot's Check Lists in those airplanes equipped with check lists, or make placard changes in those airplanes equipped with placards in accordance with the Service Instructions.

B) For those Bonanza, Debonair, Baron and Travel Air 1969 models and before airplanes listed herein, except for those Bonanza Model airplanes listed in Paragraph C, accomplish the following in accordance with Beech Service Instructions 0493-281 or later revision or with Beech Service Instructions 0492-281 or later revision, as applicable:

1) Comply with Paragraphs A(1) and (2) if these airplanes have been modified in accordance with Beech Service Instructions 0459-281 or Beech Service Instructions 0365-281, Rev. 1, or later revision, which cover installation of baffled main fuel cells.

2) Comply with Paragraph A(3).

C) For those Bonanza 1958 models and before airplanes listed herein, in accordance with Beech Service Instruction 0495-281 or later revision:

1) Install a new decal on the outside of the glass or on the face of the main fuel gage. The decal must be positioned so that the yellow band denoting minimum fuel for takeoff (7 gallons) extends up to the center of the 1/2 mark. The red band denoting unusable fuel (3 gallons) must cover the old empty mark. A new empty mark must be located between the yellow and red bands. Operate the airplane in accordance with these limitations.

2) Change the left hand and right hand tank capacities on the fuel selector panel to 17 gallons. Also change the main fuel cell filler capacity marking on each wing to indicate the above capacities.

3) Comply with Paragraphs A(3)(d) and A(3)(e).

D) Any alternate method of compliance with this AD must be referred to and approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

This amendment becomes effective May 20, 1972.