AD 76-10-12

76-10-12 BEECH: Amendment 39-2620. Applies to Beech Aircraft Corporation B200, R201, R202, R203, and 214 Series wood blade propellers having Beech Aircraft Corporation manufactured B200, R201, R203, 214 or 272 Series blades installed. (These propellers were installed originally on Beech Models 35, A35, B35, C35, D35, E35, 35R, 45 (Military YT-34), and 50 (Military L-23A) airplanes, but may be installed on other airplanes.) Compliance: Required as indicated, unless already accomplished. To prevent failure of wood blades in these propellers, accomplish the following: A) Within the next 100 hours' time in service or one year, whichever comes first, after the effective date of this AD, and thereafter at intervals not to exceed 300 hours' time in service or five years, whichever comes first, from the last inspection, visually inspect the blades as follows: 1. Carefully remove the plastic coating to expose the shank of the blade for a minimum distance of 4 1/2" outboard of the ferrule. 2. Using a 10-power glass, visually inspect the blade surface for cracks and separation as shown on the reproduction of a deteriorated blade in Figure 1. 3. If no deterioration is found, reinstall the plastic film over the exposed area in accordance with Univair Process (P-200) or an FAA-approved equivalent procedure. 4. If the blade shows any sign of deterioration prior to further flight, remove it from service and replace it with an eligible airworthy blade. 5. Only an approved propeller repair station is authorized to accomplish the inspection required in this paragraph. B) Within the next 100 hours' time in service or one year, whichever comes first, after the effective date of this AD and at each annual inspection thereafter, visually inspect the blade leading edge and tips as follows: 1. Using a 10-power magnifying glass examine the tipping area for cracks in the plastic coating coming from under the tipping. 2. Check for looseness of the tip and leading edge sheathing by holding the blade securely and gripping the sheathing by hand and attempting to flex the tipping while visually observing for relative motion between the piece to which force is applied and adjacent sheathing and blade. 3. If any of the above conditions are noted, prior to further flight, replace the blade with an eligible airworthy blade. NOTE 1: (Beech Aircraft Corporation no longer manufactures Beech Models 214, B200, R201, R202 and R203 propellers; however, propellers and replacement blades as hereinafter listed may be installed on the indicated airplane models.)

REPLACEMENT UNIVAIR WOOD BLADES

Univair Blade Model Beech Propeller Assembly Model FA203-218 or FA203-219 R200-100/R201-217-88 and R203-218-88 FA200-244 or FA200-245 B200-105/B200-220-88 and B200-100/B200-220-88 and B200-100-B200-244-88 and B200-100/B200-234-88 and B200-100/B200-264-88 See Propeller Specification P-875 for further information.

REPLACEMENT METAL BLADE PROPELLER ASSEMBLIES

Eligible Propeller Assemblies Aircraft Models Beech 215-109/215-207-88 35, A35, B35, C35, D35, E35, 35R Beech 215-109/215-213-84 or Beech 215-107/215-213-84 A35, B35, C35, D35, E35, F35, G35 Beech 215-107/215-207-88 35, A35, B35, C35, D35, E35, 35R Hartzell HC12X20-7(B,C or D) or Hartzell HCD2X20-7/8433-0 35, A35, B35, C35, D35, E35, 35R Beech 215-102/272-234-98 Model 50

See Aircraft Type Certificate Data Sheet and/or Propeller Specifications for approval of specific airplane propeller engine combinations. This amendment becomes effective June 2, 1976.