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FAA issues emergency AD following Vietnam Airlines A321 uncontained IAE V2533 engine failure
22 March 2020

FAA issues emergency AD following Vietnam Airlines A321 uncontained IAE V2533 engine failure

The U.S. FAA issued an emergency airworthiness directive following an uncontained engine failure of an IAE V2533-A5 engine of an Airbus A321.

On March 18, Vietnam Airlines flight VN920, an Airbus A321-231, powered by IAE V2533-A5 model turbofan engines, experienced an uncontained high-pressure turbine (HPT) 1st-stage disk failure on takeoff from Ho Chi Minh City-Tan Son Nhat Airport in Vietnam. The flight crew aborted the takeoff.

As a result of this occurrence, the FAA issued an emergency AD on March 21, 2020, requiring removal from service of affected HPT 1st-stage disks with specific part numbers, installed on IAE V2500 engine models. The FAA considers this an interim action as the root cause of this incident is still under investigation.

 

FAA issues emergency AD after ground fire accident involving Cirrus SF50 Vision Jet

The FAA issued an emergency airworthiness directive (AD) to remove headset amplifier and microphone interface circuit card assemblies from the Cirrus SF50 Vision Jet after a fire accident in December.

On December 27, 2019, a Cirrus SF50 Vision Jet caught fire prior to departure from Santa Monica Municipal Airport, California, USA. The private pilot was not injured, and the airplane sustained substantial damage.
Upon arrival at the airplane, the pilot began to perform preflight checks and completed a walkaround. After boarding and closing the cabin door, he continued with the checks and observed haze in the cabin accompanied by a faint smell of smoke. He continued to follow the checklists and after starting the engine, the smoke smell became stronger, and he decided to terminate flight preparations, and have a mechanic examine the airplane.
After completing the engine shutdown, he opened the main cabin door, and began to see smoke issue from the armrest area of the number 5 (right center) passenger seat. A mechanic arrived at the airplane with a fire extinguisher within a few minutes, however the smoke had become dense, and was now streaming out of the cabin door. A few minutes later, flames began to emerge from the cabin, and by 11:55 the cabin was completely engulfed. The fire department arrived at 12:02, and the fire was extinguished.
The airplane sustained extensive thermal damage, with fire consuming the cabin roof and destroying the cabin contents from the aft wall of the parachute (CAPs) enclosure through to the engine inlet nacelle, with fire damage more extensive on the right side of the airframe. Fire had consumed the lower right walls of the cabin down to the wing root, with only composite cloth remaining. The right wing was intact, but sustained thermal damage to the upper skin from the root outboard about 4 ft short of the tip. The left wing, and lower left exterior skins of the cabin were largely free of fire damage.

An investigation determined the probable root cause was a malfunction of the headset amplifier and the microphone interface circuit card assemblies for the 3.5 millimeter audio and microphone jacks. This malfunction likely resulted in an electrical short and subsequent uncontained cabin fire without activating circuit protection.
On February 14, 2020, the FAA issued an emergency AD to disconnect and remove the headset amplifier and microphone interface circuit card assemblies for the 3.5 mm audio and microphone jacks on all Cirrus SF50’s.

FAA issues Emergency AD on GE90 engines after Boeing 777-300ER uncontained engine failure

The U.S. FAA issued an Emergency Airworthiness Directive (AD)  in the wake of a Boeing 777-300ER uncontained engine failure occurrence on October 20, 2019.

A Thai Airways Boeing 777-300ER airplane powered by GE GE90-115B model turbofan engines experienced an uncontained high-pressure turbine (HPT) failure that resulted in an aborted takeoff at Bangkok-Suvarnabhumi International Airport. Debris impacted the aircraft fuselage and the other engine.

To prevent a recurrence, the FAA requires the removal from service of the GE GE90-110B1 or GE90-115B model turbofan engine interstage seal, part number 2505M72P01 or 2448M33P01, from the affected engines.

The AD lists 16 engine serial numbers that are affected.

More information:

Canada issues Emergency AD to limit Airbus A220 engine power settings after recent incidents

Regulator Transport Canada issued an Emergency Airworthiness Directive (AD) to limit certain engine power settings on Airbus A220 aircraft following three recent failures.

Three inflight shutdowns occurred within three months time: July 25, 2019, September 16, 2019, and October 15, 2019. In all cases, the aircraft involved was a Swiss International Air Lines Airbus A220-300 (formerly named Bombardier CSeries 300) with Pratt & Whitney PW1524G-3 engines. These inflight shutdowns were due to failure of the low-pressure compressor (LPC) stage 1 rotor, which resulted in the rotor disk releasing from the LPC case and damaging the engine.

Investigations are ongoing to determine the root cause., but preliminary investigation results indicate high altitude climbs at higher thrust settings for engines with certain thrust ratings may be a contributor. This condition, if not corrected, could lead to an uncontained failure of the engine and damage to the aeroplane.
Transport Canada issued the AD on October 26, introducing a new Aircraft Flight Manual (AFM) limitation and normal procedure to limit the engine N1 setting to 94% while above 29000 feet. This AD is considered an interim action and further AD action may follow.

 

FAA issues emergency AD on GE90-115B turbofan engines following uncontained failure incident

The FAA issued an emergency Airworthiness Directive (AD), ordering the removal of a seal from certain General Electric GE90-115B turbofan engines.

The emergency AD was prompted by an incident that occurred on October 20, 2019, in which a Thai Airways Boeing 777-300ER airplane powered by GE GE90-115B turbofan engines experienced an uncontained high-pressure turbine (HPT) failure that resulted in an aborted takeoff. Debris impacted the aircraft fuselage and the other engine.

The AD calls for the removal from service of the Interstage Seal of certain GE GE90-115B turbofan engines, within 25 flight cycles.

 

Airbus A220 PW1500G engine failures prompt inspection AD

The FAA issued an airworthiness directive (AD), requiring initial and repetitive inspections on certain Pratt & Whitney geared turbofan engines following two recent incidents.

The first inflight shutdown occurred on July 25, 2019 and the second occurred on September 16, 2019. In both cases, the aircraft involved was a Swiss International Air Lines Airbus A220-300 with Pratt & Whitney PW1524G-3 engines.
These inflight shutdowns were due to failure of the low-pressure compressor (LPC) stage 1 rotor, which resulted in the rotor disk releasing from the LPC case and damaging the engine.

To prevent recurrences, the FAA requires initial and repetitive borescope inspections of the LPC inlet guide vane (IGV) and the LPC stage 1 rotor and, depending on the results of the inspections, replacement of the LPC.

Although these incidents occurred on PW1524G-3 model turbofan engines, the FAA is including PW1900 engines because similarities in type design make these engines susceptible to the same unsafe condition. The required inspections have to be performed within 50 flight cycles from September 26, and thereafter at intervals not to exceed 50 flight cycles until the engine accumulates 300 flight cycles.

The investigation into both incidents has been delegated to the NTSB.

Parts from the low-pressure compressor stage 1 rotor in the July 25 incident

CASA Australia and EASA lift grounding of GA-8 Airvan

Australian and European regulators decided to lift the grounding of the GA8 Airvan.

The grounding came into effect on July 20, following a fatal accident on 14 July 2019, when a GA8 Airvan skydiving plane crashed in Sweden. At 4000 meters altitude, the aircraft suffered a separation of a wing.

Since the emergency AD was issued, CASA Australia informed EASA that the results of the physical inspection of the accident aircraft indicate that it appears to have been exposed to aerodynamic loads beyond those for which the type design is certificated.

No evidence was found to indicate that an unsafe condition exists or could develop that would warrant further grounding.

CASA Australia and EASA ground GA-8 Airvan following a recent accident in Sweden

Australian and European regulators decided to ground the GA8 Airvan following a recent accident.

On 14 July 2019, a fatal accident occurred with a GA8 Airvan skydiving plane in Sweden. Indications are that the aircraft, at 4000 meters altitude, suffered structural failure. Early reports are that a wing may have detached prior to the accident, but, at this time, the root cause of the accident cannot be confirmed.
CASA Australia, the authority of the State of Design of the affected type design, has informed EASA that a Direction will be issued, which provides for the temporary prohibition of operations of the GA8 Airvan in Australia. The Direction will take effect on 20 July 2019 and will be valid for 15 days. Based on all available information, and taking into account the Australian Direction, EASA has
decided to ground the affected aeroplanes registered in EASA Member States, until further notice.
The emergency AD 2019-0177-E is considered an interim action and further AD action may follow.

File photo of a GA8 Airvan (c) H. Ranter

 

FAA: Some Boeing 737NG and MAX aircraft may have improperly manufactured leading edge slat tracks

Boeing has informed the FAA that certain 737NG and 737MAX leading edge slat tracks may have been improperly manufactured and may not meet all applicable regulatory requirements for strength and durability.

Following an investigation conducted by Boeing and the FAA Certificate Management Office (CMO), the FAA determined that up to 148 parts manufactured by a Boeing sub-tier supplier are affected. Boeing has identified groups of both 737NG and 737MAX airplane serial numbers on which these suspect parts may have been installed. 32 NG and 33 MAX are affected in the U.S. Affected worldwide fleet are 133 NG and 179 MAX aircraft.

The affected parts may be susceptible to premature failure or cracks resulting from the improper manufacturing process. Although a complete failure of a leading edge slat track would not result in the loss of the aircraft, a risk remains that a failed part could lead to aircraft damage in flight, the FAA stated.

The FAA will issue an Airworthiness Directive to mandate Boeing’s service actions to identify and remove the discrepant parts from service. Operators of affected aircraft are required to perform this action within 10 days. The FAA today also alerted international civil aviation authorities of this condition and required actions.

Upset incidents lead EASA to issue emergency AD on CitationJets with active winglets

The European Union Aviation Safety Agency (EASA) issued an emergency airworthiness directive (2019-0086-E) in the wake of recent in-flight upset incidents involving Cessna CitationJets, modified to have Tamarack ATLAS winglets.

The active load alleviation system (ATLAS), when operational, deflects the Tamarack active control surfaces (TACS) on the outboard wings. This system can aerodynamically “turn off” the winglet in specific conditions, thus dumping additional loads. Load alleviation enables a substantial increase in aspect ratio without the need for wing reinforcement and added weight, according to Tamarack. The modification is available for Cessna CitationJet models.

Recently, occurrences have been reported in which ATLAS appears to have malfunctioned, causing upset events where, in some cases, the pilots had difficulty to recover the aircraft to safe flight. Investigation continues to determine the cause(s) for the reported events. This condition, if not corrected, could lead to loss of control of the aircraft, EASA states.

The AD issued by EASA requires the Tamarack ATLAS to be deactivated and the TACS to be fixed in place. It also requires implementation of operational limitations and repetitive pre-flight inspections by amending the applicable flight manual.

Within 100 flight hours, owners must contact the ATLAS-manufacturer for modification instructions.

Update 11 July 2019
Both EASA and the FAA approved fixes incorporated in two Tamarack Aerospace service bulletins to resolve the emergency airworthiness directive that required deactivating Tamarack’s active load-alleviation system (ATLAS) on Cessna CitationJets.