# AD 98-01-08: Exhaust Roller Rocker Arm - Type: Airworthiness directive - Status: Current - Products: Roller rocker arm P/N PE 92I intake and PE92E exhaust (Performance Engineering STC SE8594SW) - Superseded by: Nothing supersedes this AD - Product type: Engine - Docket: 97-ANE-48-AD - Registered aircraft: 35,739 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/398C858B07330B69862577C700670015.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/98-01-08 ## The airworthiness directive 98-01-08 TELEDYNE CONTINENTAL MOTORS with STC SE8594SW: Priority Letter issued on December 23, 1997. Docket No. 97-ANE-48-AD. Applicability: Teledyne Continental Motors (TCM) IO-520-A, -B, -BA, -C, -CB, -D, -E, -F, -K, -L, -M, -MB, -J; TSIO-520-A, -B, -D, -E, -F, -G, -H, -J, -K, -L, -M, -N, -P, -R, -T, -U, -UB, -AF, -CE, -VB, -WB, -NB, -LB, -KB, -JB, -EB, -DB, -BB; O-470-B, -G, -K, -L, -M, -P, -R, -S, -U; IO-470-C, -D, -E, -F, -G, -H, -L, -M, -N, -P, -R, -S, -U, -V; and IO-550-B, -C, and -G series reciprocating engines, with Performance Engineering exhaust roller rocker arms, Part Number (P/N) PE92E, installed, in accordance with Supplemental Type Certificate (STC) SE8594SW. These engines are installed on but not limited to Cessna 180, 182, 185, 206, 207, 210, 310, 335, 340, 401, 402, 414; Raytheon (Beech) 33, 35, 36, 55, 58; Bellanca 17-30; New Piper PA-46; Fletcher FU-24A aircraft. Note 1: This airworthiness directive (AD) applies to each engine 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 engines 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 (b) 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. Compliance: Required as indicated, unless accomplished previously. To prevent exhaust roller rocker arm failure, which can result in bent push rods, ruptured rocker arm covers, loss of engine oil, engine power loss and roughness, and possible engine failure, accomplish the following: (a) Within 25 hours time in service after the effective date of this AD, remove from service all Performance Engineering exhaust roller rocker arms, P/N PE92E, and replace with serviceable parts, as follows: (1) For IO-520, TSIO-520, O-470, IO-470, and all IO-550 series engines except the IO-550-G, replace with serviceable TCM exhaust roller rocker arms, P/N 652130. (2) For IO-550-G series engines, replace with serviceable TCM exhaust roller rocker arms, P/N 652966. (b) 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, Special Certification Office. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Special Certification Office. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Special Certification Office. (c) 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. (d) Priority Letter AD 98-01-08, issued December 23, 1997, becomes effective upon receipt. ## Rule preamble ### Supplementary information 98-01-08 Teledyne Continental This priority letter Airworthiness Directive (AD) is applicable to Teledyne Continental Motors (TCM) IO-520 series, TSIO-520 series, O-470 series, and IO-550 series reciprocating engines, with Performance Engineering exhaust roller rocker arms, Part Number (P/N) PE92E, installed, in accordance with Supplemental Type Certificate (STC) SE8594SW. This AD is prompted by reports of broken exhaust roller rocker arms. The investigation revealed that these exhaust roller rocker arms had failed due to oil galleries drilled off center during manufacturing, too close to the outside edge. In addition, tests disclosed that the compositional requirements of the exhaust roller rocker arms did not meet hardness specifications. This condition, if not corrected, could result in exhaust roller rocker arm failure, which can result in bent push rods, ruptured rocker arm covers, loss of engine oil, engine power loss and roughness, and possible engine failure. Sincean unsafe condition has been identified that is likely to exist or develop on other engines of this same type design, this AD requires, within 25 hours time in service (TIS) after receipt of this priority letter AD, removal from service of all affected exhaust roller rocker arms. The correct location of the oil gallery holes cannot be visually determined, so the FAA has determined that all affected parts must be removed from service. The STC owner is no longer in business producing new parts, therefore all replacement parts must be from TCM. This rule is issued under 49 U.S.C. Section 44701 (formerly section 601 of the Federal Aviation Act of 1958) pursuant to the authority delegated to me by the Administrator, and is effective immediately upon receipt of this priority letter. ## Affected data sheets (5) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS E8CE](https://openairdocs.org/tcds/E8CE): Continental Aerospace Technologies, Inc.; names 27 of 31 models: TSIO-520-BB, TSIO-520-B, TSIO-520-P, TSIO-520-R, TSIO-520-AF, TSIO-520-M, TSIO-520-J, TSIO-520-A… - [TCDS 3E1](https://openairdocs.org/tcds/3E1): Continental Aerospace Technologies, Inc.; names 13 of 19 models: IO-470-H, IO-470-D, IO-470-R, IO-470-M, IO-470-L, IO-470-P, IO-470-S, IO-470-V… - [TCDS E5CE](https://openairdocs.org/tcds/E5CE): Continental Aerospace Technologies, Inc.; names 13 of 18 models: IO-520-BA, IO-520-A, IO-520-B, IO-520-C, IO-520-L, IO-520-J, IO-520-MB, IO-520-F… - [TCDS E-273](https://openairdocs.org/tcds/E-273): Continental Aerospace Technologies, Inc.; names 9 of 21 models: O-470-R, IO-470-C, O-470-L, O-470-G, O-470-U, O-470-S, O-470-M, O-470-K… - [TCDS E3SO](https://openairdocs.org/tcds/E3SO): Continental Aerospace Technologies, Inc.; names 3 of 20 models: IO-550-G, IO-550-B, IO-550-C ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 35,739 (0 by airframe model, 35,739 by engine model) - Makers: Cessna 21,402, Beech 9,993, Cirrus Design 1,268, Raytheon 595, Bellanca 580, Mooney 462, Hawker Beechcraft 209, Piper 191, Textron 132, Lancair 124 Models with the most aircraft: - [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series): 12,779 aircraft (engine model) - [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series): 9,486 aircraft (engine model) - [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series): 4,499 aircraft (engine model) - [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series): 4,064 aircraft (engine model) - [Continental IO-550 series](https://openairdocs.org/engine/continental-io-550-series): 3,077 aircraft (engine model) - [Continental IO-550-B](https://openairdocs.org/engine/continental-io-550-b): 373 aircraft (engine model) - [Continental IO-470 series](https://openairdocs.org/engine/continental-io-470-series): 225 aircraft (engine model) - [Continental IO-550-C](https://openairdocs.org/engine/continental-io-550-c): 199 aircraft (engine model) - [Continental IO-550-G](https://openairdocs.org/engine/continental-io-550-g): 115 aircraft (engine model) - [Continental O-470R](https://openairdocs.org/engine/continental-o-470r): 107 aircraft (engine model) - [Continental IO-520-D](https://openairdocs.org/engine/continental-io-520-d): 95 aircraft (engine model) - [Continental IO-520-F](https://openairdocs.org/engine/continental-io-520-f): 80 aircraft (engine model) - [Continental TSIO-520-M](https://openairdocs.org/engine/continental-tsio-520-m): 60 aircraft (engine model) - [Continental O-470-U](https://openairdocs.org/engine/continental-o-470-u): 56 aircraft (engine model) - [Continental TSIO-520-NB](https://openairdocs.org/engine/continental-tsio-520-nb): 52 aircraft (engine model) - [TCM Cont TSIO-520 series](https://openairdocs.org/engine/tcm-cont-tsio-520-series): 49 aircraft (engine model) - [Lycoming IO-520 series](https://openairdocs.org/engine/lycoming-io-520-series): 49 aircraft (engine model) - [Continental TSIO-520-UB](https://openairdocs.org/engine/continental-tsio-520-ub): 27 aircraft (engine model) - [Continental IO-520-BA](https://openairdocs.org/engine/continental-io-520-ba): 25 aircraft (engine model) - [Continental TSIO-520-R](https://openairdocs.org/engine/continental-tsio-520-r): 22 aircraft (engine model) All 65 models: https://openairdocs.org/ad/98-01-08/models.md Every aircraft: https://openairdocs.org/ad/98-01-08/aircraft.md ## Related documents - [STC SE8594SW](https://openairdocs.org/stc/SE8594SW): Installation of roller rocker arm P/N PE 92I intake and PE92E exhaust.. Performance Engineering, Named in the applicability --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.