Skip to content
Safety and emergency equipment

STC ST735SO

FAA DRS lists ST735SO as Current · Surrendered, held by Derlan Inc, for McDonnell Douglas DC-9-31, McDonnell Douglas DC-9-41, and McDonnell Douglas DC-9-34F, and 12 more aircraft configurations. Recorded change: Installation of protective rigid cover over the tail cone emergency evacuation slide. Snapshot dated June 30, 2026.

FAA-listed holder
Derlan Inc
Aircraft configurations
15
FAA revision date
FAA status
Current · Surrendered

Recorded modification

What the FAA record covers

ST735SO identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.

Applicability

Aircraft named in FAA DRS

Named aircraft: McDonnell Douglas DC-9-31, McDonnell Douglas DC-9-41, and McDonnell Douglas DC-9-34F, and 12 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

McDonnell Douglas DC-9-31A6WEMcDonnell Douglas DC-9-41A6WEMcDonnell Douglas DC-9-34FA6WEMcDonnell Douglas DC-9-34A6WEMcDonnell Douglas DC-9-33FA6WEMcDonnell Douglas DC-9-51A6WEMcDonnell Douglas DC-9-32A6WEMcDonnell Douglas DC-9-11A6WEMcDonnell Douglas DC-9-21A6WEMcDonnell Douglas DC-9-15FA6WEMcDonnell Douglas DC-9-15A6WEMcDonnell Douglas DC-9-14A6WEMcDonnell Douglas DC-9-13A6WEMcDonnell Douglas DC-9-12A6WEMcDonnell Douglas DC-9-32FA6WE

Buyer checks

Confirm before sourcing

Related safety and emergency equipment STCs