The U.S. aircraft register, updated daily
Parts

Seal External

No failure report names the seal external. 7 FAA approvals let 5 companies make a replacement seal external, Dec Technologies INC holding the most (2).

Approved replacement parts 7 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a seal external and sell it as an approved part for the models named. These are the companies holding such approvals for a seal external:

MakerPartReplacesFitsGrantedStatus
Aircraft Component Design LLCSeal External Pressure 5123T81P03ACD5123T81P03General Electric Company. CT7-9B, CT7-9B1, CT7-9B22023-01-20current
Aviation Component Services, INCSeal-External Pressure 1359M84P08ACS1359M84P06, 1359M84P08, 1359M84P11CFM International, S.A. CFM56-5C3/P, CFM56-5C4, CFM56-5C4/P2017-06-13current
Aviation Component Services INCSeal External Pressure 1359M84P08ACSCFM International 1359M84P06, 1359M84P08, 1359M84P11CFM International CFM56-5C2/4, CFM56-5C2/F, CFM56-5C2/F42005-03-13current
Aviation Component Services INCSeal External Pressure 1359M84P08ACSCFM International 1359M84P06, 1359M84P08, 1359M84P11CFM International CFM56-5C2/4, CFM56-5C2/F, CFM56-5C2/F42005-03-13current
Jet Avion Corporation A Heico Aerospace CompanySeal-External Pressure JA1359M84P081359M84P08CFM International CFM56-5A Series, CFM56-5B Series,...2003-12-18current
Dec Technologies INCSeal External Pressure DEC21-038-501General Electric 1359M84P06, 1359M84P08, 1359M84P11CFM International CFM56-5C2/G, -5C3/G, -5C42001-10-16current
Dec Technologies INCSeal External Pressure DEC21-006-503General Electric 9512M47P01, Seal External PressureCFM International CFM56-3, -3 -B1, -3B1995-03-07current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.