AD-97-18-02
Hartzell Propeller blades, clamp, hub


Category: navion, Hartzell, propeller, blade, clamp, hub

Applicability: Hartzell Propeller Inc. ( )HC (2,3) (X,V) C )-( ) series and HA-A2V20-1B series propellers with aluminum blades. These propellers are installed on but not limited to the following aircraft: Multitech (Temco): D16 TWIN NAVION; Dl6A TWIN NAVION , -A, -B

The parenthesis that appear in the propeller models indicate the presence or absence of additional letter(s) which vary the basic propeller hub model designation. This airworthiness directive is applicable regardless of whether these letters are present or absent on the propeller hub model designation.

This AD applies to each propeller identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For propellers that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (g) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.

Supersedes: n/a

Compliance: Required as indicated, unless accomplished previously.

Procedure: To prevent blade separation due to cracked blades, hubs, or blade clamps, which can result in loss of control of the airplane, accomplish the following:
(a) On Hartzell propeller models with hub models C )HC (1,4,5,8) (2,3) (X,V) C )-( ) perform initial and repetitive inspections and, if necessary, replace with serviceable parts in accordance with Hartzell Propeller Inc. Service  Bulletin (SB) No. HC-SB-61-217, Revision l, dated July 11, 1997, as follows:
(1) Initially perform a fluorescent dye penetrant and eddy current inspection of the blade, an optical comparator inspection of the blade retention area, a dye penetrant inspection of the blade internal bearing bore, and a visual and magnetic particle inspection of the blade clamp and of the hub. The initial inspection is required within the following:
(i) 1,000 hours time since new (TSN) for propellers with less than 900 hours TSN on the effective date of this AD, provided that the initial inspections are performed within 60 calendar months TSN or 24 calendar months after the effective date of this AD, whichever calendar time occurs later, or
(ii) 100 hours time in service (TIS) for propellers with 900 or more hours TSN, or unknown TSN, on the effective date of this AD, provided that the initial inspections are performed within 24 calendar months after the effective date of this AD.
(2) Thereafter, perform repetitive fluorescent dye penetrant and eddy current inspection of the blade, an optical comparator inspection of the blade retention area, and a visual and magnetic particle inspection of the blade clamp. The repetitive inspection is required at intervals not to exceed 500 hours TIS or 60 calendar months, whichever occurs first, since last inspection.
(3) Thereafter, perform a repetitive visual and magnetic particle inspection of the hub. This repetitive hub inspection is required at intervals not to exceed 250 hours TIS or 60 calendar months, whichever occurs first, since last inspection.
(4) Thereafter, perform a repetitive dye penetrant inspection of the blade internal bearing bore. This repetitive blade internal bearing bore inspection is required at intervals not to exceed 60 calendar months since last inspection.
(b) On Hartzell propeller models with hub models ( )HC (A,D) (2,3) CX,V) C( )-( ),and HA-A2V20-lB, except HC-A3VF-7( ), perform initial and repetitive inspections and, if necessary, replace with serviceable parts in accordance with Hartzell SB No. HC-SB-61-217, Revision l, dated July 11, 1997, as follows:
(l) Initially perform a fluorescent dye penetrant and eddy current inspection of the blade, an optical comparator inspection of the blade retention area, a visual and magnetic particle inspection of the blade clamp, and a dye penetrant inspection of the blade internal bearing bore. The initial inspection is required within the following:
(i) 1,000 hours TSN for propellers with less than 800 hours TSN on the effective date of this AD, provided that the initial inspections are performed within 60 calendar months TSN or 24 calendar months after the effective date of this AD, whichever calendar time occurs later, or
(ii) 200 hours TIS for propellers with 800 or more hours TSN, or unknown TSN, on the effective date of this AD, provided that the initial inspections are performed within 24 calendar months after the effective date of this AD.
(2) Thereafter, perform repetitive fluorescent dye penetrant and eddy current inspection of the blade, an optical comparator inspection of the blade retention area, and a visual and magnetic particle inspection of the blade clamp. The repetitive inspection is required at intervals not to exceed 500 hours TIS or 60 calendar months, whichever occurs first, since last inspection.
(3) Thereafter, perform repetitive dye penetrant inspections of the blade internal bearing bore. This repetitive blade internal bearing bore inspection is required at intervals not to exceed 60 calendar months since last inspection.
(c) On Hartzell propeller models with hub models HC A3VF-7 ( ) perform initial and repetitive inspections and, if necessary, replace with serviceable parts in accordance with Hartzell SB No. HC-SB-61-217, Revision l, dated July 11, 1997, as follows:
(h) Initially perform a fluorescent dye penetrant and eddy current inspection of the blade, an optical comparator inspection of the blade retention area, a visual and magnetic particle inspection of the blade clamp, and a dye penetrant inspection of the blade internal bearing bore. The initial inspection is required within the following:
(i) 3,000 hours TSN for propellers that have never been overhauled and have less than 2,500 hours TSN on the effective date of this AD, provided that the initial inspections are performed within 60 calendar months TSN or 24 calendar months after the effective date of this AD, whichever calendar time occurs later, orpropellers that have been overhauled but have less than 2,500 hours TIS since last overhaul on the effective date of this AD, provided that the initial inspections are performed within 60 calendar months TIS since last overhaul or 24 calendar months after the effective date of this AD, whichever calendar time occurs later, or
(iii) 500 hours TIS, for propellers that have never been overhauled and have 2,500 or more hours TSN on the effective date of this AD, or propellers which have been overhauled and have 2,500 or more hours TIS since last overhaul on the effective date of this AD, or propellers with unknown TSN, provided that the initial inspections are performed within 24 calendar months after the effective date of this AD.
(2) Thereafter, perform repetitive fluorescent dye penetrant and eddy current inspection of the blade, an optical comparator inspection of the blade retention area, and a visual and magnetic particle inspection of the blade clamp. The repetitive inspection is required at intervals not to exceed 3000 hours TIS or 60 calendar months, whichever occurs first, since last inspection.
(3) Thereafter, perform repetitive dye penetrant inspections of the blade internal bearing bore. This repetitive blade internal bearing bore inspection is required at intervals not to exceed 60 calendar months since last inspection.
(d) The initial inspection of the internal blade bearing bore required by paragraphs (a) (1), (b) (1), or (c) (1) of this AD need not be accomplished again if previously accomplished in accordance with page 4 of Hartzell SB No. HC—SB—61—217, Revision l, dated July 11, 1997.
(e) If not previously accomplished, shot peen the propeller blade shank area during the initial inspection required by paragraphs (a) (1), (b) (1), or (c) (1), as appropriate, and perform the shot peening in accordance with Hartzell SB No. HC-SB-61-217, Revision l, dated July 11, 1997. Re-shot peening of the propeller blade shank area during the repetitive inspections required by paragraphs (a) (2), (b) (2), or (c) (2), as appropriate, is required only if the propeller blade shank area has been repaired or has excessive wear or damage in accordance with Hartzell SB No. HC-SB-61-217, Revision l, dated July 11, 1997.
(f) Report inspection results to the Manager, Chicago Aircraft Certification Office, FAA, Small Airplane Directorate, 2300 East Devon Ave., Des Plaines, IL 60018,
(ii) 3,000 hours TIS since last overhaul for within 15 working days of the inspection. Reporting requirements have been approved by the Office of Management and Budget (0MB) and assigned 0MB control number 2120-0056.
(g) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Chicago Aircraft Certification Office. The request should be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Chicago Aircraft Certification Office.

Note: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Chicago Aircraft Certification Office.

(h) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the aircraft to a location where the requirements of this AD can be accomplished.
(i) The actions required by this AD shall be done in accordance with the following Hartzell Propeller Inc. SB: Document No. Pages Date HC-SB-61-217 1-16 July 11, 1997

Notes: This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552 (a) and 1. CFR part 51. Copies may be obtained from:

ATTN: Product Support
Hartzell Propeller Inc.
One Propeller Place, Piqua, OR 45356-2634,
telephone (937) 778-4200, fax (937) 778-4321.

Copies may be inspected at the FAA, New England Region, Office of the Assistant Chief Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.  This amendment becomes effective on September 11,
1997.

FOR FURTHER INFORMATION CONTACT:

Tomaso DiPaolo, Aerospace Engineer, Chicago Aircraft Certification Office, FAA, Small Airplane Directorate
2300 East Devon Ave., Des Plaines, IL 60018
telephone (847) 294-7031, fax (847) 294-7834


AD-97-18-02