A-85-001
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN AIRWORTHINESS DIRECTIVE (AD) TO REQUIRE, THAT BEFORE FURTHER COMMERCIAL OPERATION IN THE UNITED STATES, THE HORIZONTAL STABILIZER ATTACHMENT OF EMB-110P1 AND -110P2 MODEL AIRPLANES NOT PREVIOUSLY MODIFIED IN ACCORDANCE WITH AD 83-14-09, AMENDMENT 39-4527, PARAGRAPH (D) OR (E), BE INSPECTED USING AN IMPROVED INSPECTION PROCEDURE TO ENHANCE DETECTION OF LOOSE OR SHEARED RIVETS, PARTICULARLY WHERE BULKHEAD 33 TRANSMITS THE LOADS FROM THE STABLIZIER FORWARD ATTACHMENT TO THE FUSELAGE MONOCOQUE STRUCTURE. THE INSPECTION PROCEDURE SHOULD REQUIRE REMOVAL OF CONTROLS AS NEEDED FOR ACCESS TO RIVETED JOINTS AND APPLICATION OF EXTERNAL LOADS TO DETECT RELATIVE MOVEMENT BETWEEN STRUCTURAL MEMBERS. THE AD SHOULD REQUIRE THAT DEFICIENCIES DETECTED DURING INSPECTION BE REPORTED TO THE FAA AND THAT THEY BE CORRECTED IN ACCORDANCE WITH AN APPROVED PROCEDURE BEFORE FURTHER FLIGHT. (URGENT)
In plain language (FlightFinder summary)
The FAA is asked to issue an airworthiness directive requiring an improved inspection of the horizontal stabilizer attachment on certain EMB-110P1 and -110P2 airplanes not previously modified. The inspection must detect loose or sheared rivets, especially where bulkhead 33 transmits loads, by removing controls as needed and applying external loads to check for relative movement. Any deficiencies found must be reported to the FAA and corrected before further flight.
This plain-language summary is written by FlightFinder to explain the recommendation above. It is not the official wording — the verbatim NTSB text is quoted above.
Details
| Status | Closed - Acceptable Alternate Action |
|---|---|
| Mode | Aviation |
| Closed | Aug 3, 1987 |
| NTSB number | DCA85AA004 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).