Where to Buy
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Documentation
General information based on part classification, not a certification determination. Your operator's quality manual governs.
What to ask the seller for
- FAA Form 8130-3 from the PAH or an authorized release traceable to the PAH
- Manufacturer's CofC if a Form 8130-3 was not issued
Governing reference: FAA Order 8130.21J
PMA Alternatives1 found
| PMA Part # | Manufacturer | Supplement | Approved | Source |
|---|---|---|---|---|
| HEM20401 WASHER | Hemico Inc. | 104 | 2024-10-18 | — |
Supplemental Type Certificates2 found
FAA-approved modifications that reference this part number
ONE ONLY STC, SN 20401: Supplemental Type Certificate (STC) for reduction of an in flight cabin seating arrangement accommodating a maximum of 16 passengers on DOUGLAS Model DC3C-S1C3G, Serial Number 20401
Aircraft: DC3C-S1C3G
Descriptive data pertaining to this design change are considered inadequate for duplication in other products. This approval is limited to only the installation made to McDonnell Douglas Corporation Model DC3C-S1C3G, Serial No. 20401. Replacement of single engine carbon dioxide fire bottles with dual Halon bottles for model DC3C-S1C3G S/N 20401 only.
Aircraft: DC3C-SC3G
Airworthiness Directives
Synced 40 days ago (09/27/2026)No Active Airworthiness Directives
No FAA or EASA ADs are linked to this part number. Always verify against the aircraft's maintenance records before install.
Service Difficulty Reports
No Service Difficulty Reports
No failure reports found for this part number in the FAA SDR database.
Suspect-Parts Alerts (SUP/UPN)
No Suspect-Parts Alerts
This manufacturer is not named in any active FAA Suspect Unapproved Parts (SUP/UPN) notification.
NSN Cross-References1 NSN — DLA WebFLIS
National Stock Numbers assigned to this part number by the U.S. Defense Logistics Agency
| NSN | Standardized Name | FSC | DLA List Price (gov't catalog) | CAGE / Manufacturer |
|---|---|---|---|---|
| 1660-00-656-8772 | OXYGEN SYSTEM,AIRCRAFT SURVIVAL | 1660 | — | 53655AVOX SYSTEMS INC DBA AVOX SYSTEMS INC |
DLA PUBLOG published list price — government procurement catalog, not a commercial market price. Prices may differ from current commercial availability.
Government Award Prices
U.S. government contract award prices from FPDS — unit prices for NSN purchases by DoD/DLA agencies
No government contract award price data found for this part number.
Identifiers
Manufacturer
AVOX SYSTEMS INC DBA AVOX SYSTEMS INC
Source
DLA WebFLIS
ATA Chapter
21
Type
OEM