The U.S. aircraft register, updated daily
Parts

Expander

No failure report names the expander. 20 FAA approvals let 5 companies make a replacement expander, Crane Resistoflex holding the most (9).

Approved replacement parts 20 parts manufacturer approvals

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

Crane Resistoflex 9Kapco 4Superior Air Parts INC 3Pacific Sky Supply INC 2Airtomic - A Dover Company (Formerly Cook Airtomic) 2

For these models most: Mcdonnell Douglas DC-9 (2), Mcdonnell Douglas DC-10 (2), Mcdonnell Douglas Aircraft Co MD-88 (2), Boeing 707 (2), Douglas DC-8 (1).

MakerPartReplacesFitsGrantedStatus
Airtomic - A Dover Company (Formerly Cook Airtomic)Expander AIR5432OEM PartBoeing 707-100, -200, -300 Series2003-02-17current
Airtomic - A Dover Company (Formerly Cook Airtomic)Expander AIR5740OEM PartBoeing 707-100, -200, -300 Series2003-02-17current
Crane ResistoflexExpander R44191P-0406OEMLockheed L-1011-3851995-10-18current
Crane ResistoflexExpander R44191P-0405OEMLockheed L-1011-3851995-10-18current
Crane ResistoflexExpander R44191P-1216UOEMLockheed L-1011-3851995-10-18current
Crane ResistoflexExpander R44191P-0810OEMLockheed L-1011-3851995-10-18current
Crane ResistoflexExpander R44191P-0608OEMLockheed L-1011-3851995-10-18current
Crane ResistoflexExpander R44191P-1216OEMLockheed L-1011-3851995-10-18current
Crane ResistoflexExpander R44191P-0405WOEMLockheed L-1011-3851995-10-18current
Crane ResistoflexExpander R44191P-2024OEMLockheed L-1011-3851995-10-18current
Crane ResistoflexExpander R44184P-0502OEMLockheed L-1011-3851995-10-18current
Pacific Sky Supply INCExpander - 5.026 OD x .2435 Wide 6788664PAllison 6788664Allison Engine 501-D13, 501-D13A, 501-D13D1994-09-28current
Pacific Sky Supply INCExpander - 3.851 x 3/16 Inconel X 6788349PAllison 6788349Allison Engine 501-D221994-07-27current
Superior Air Parts INCExpander SA634033Teledyne Continental 634033Teledyne Continental IO-520-A, B, C1993-09-26current
Superior Air Parts INCExpander SA632039Teledyne Continental 632039Teledyne Continental IO-470-D, E, F1993-09-14current
Superior Air Parts INCExpander SA634703Teledyne Continental 634703Teledyne Continental IO-470, TSIO-4701993-09-14current
KapcoExpander S4929713-22, -28, -37, -40McDonnell Douglas S4929713-22, -28, -37, -40McDonnell Douglas DC-10-10, -10F, -151993-04-14current
KapcoExpander S4929713-213, -216, -221,...McDonnell Douglas S4929713-213, -216, -221,...McDonnell Douglas DC-10-10, -10F, -151993-04-14current
KapcoExpander S4929713-26, -336, -339,...McDonnell Douglas S4929713-26, -336, -339,...McDonnell Douglas DC-9-11, -12, -131993-04-14current
KapcoExpander S4929713-20, -33McDonnell Douglas S4929713-20, -33McDonnell Douglas DC-8-11, -12, -211993-04-14current

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.