physics

Indonesia AirAsia Flight 8501

Indonesia AirAsia Flight 8501 is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Indonesia AirAsia Flight 8501 rather than just read about it. In short: Indonesia AirAsia Flight 8501 was a scheduled international passenger flight operated by Indonesia AirAsia from Surabaya, Indonesia, to Singapore. On 28 December 2014, the Airbus A320 flying the route crashed into the Java Sea, killing all 162 of the people on board.

Key takeaways

Indonesia AirAsia Flight 8501 belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Indonesia AirAsia Flight 8501 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Indonesia AirAsia Flight 8501 from memory before moving on to harder problems.

Reference excerpt

Indonesia AirAsia Flight 8501 was a scheduled international passenger flight operated by Indonesia AirAsia from Surabaya, Indonesia, to Singapore. On 28 December 2014, the Airbus A320 flying the route crashed into the Java Sea, killing all 162 of the people on board. When search operations ended in March 2015, only 116 bodies had been recovered. As of 2026, this is the only fatal accident involving AirAsia and its affiliates. In December 2015, the Indonesian National Transportation Safety Committee (KNKT or NTSC) released a report concluding that a non-critical malfunction in the rudder control system prompted the captain to perform a non-standard reset of the on-board flight control computers. Control of the aircraft was subsequently lost, resulting in a stall and uncontrolled descent into the sea. Miscommunication between the two pilots was cited as a contributing factor.

Accident

Indonesia AirAsia Flight 8501 was a scheduled flight from Surabaya, East Java, Indonesia, to Singapore on Sunday, 28 December 2014. It was scheduled to depart Juanda International Airport at 05:20 Western Indonesian Time (WIB, UTC+7) and arrive at Singapore Changi Airport at 08:30 Singapore Standard Time (SST, UTC+8). The aircraft took off at 05:35 WIB and reached its cruising altitude at flight level (FL) 320 at 9,800 metres (32,000 ft) fourteen minutes later. It joined air route M635, heading north-west out over the western Java Sea. The plane was in contact with Jakarta air traffic control (ATC). The flight was normal until 06:00 when an electronic centralised aircraft monitor (ECAM) memo was displayed, along with a master caution light, to indicate a fault with the rudder limiter system. Captain Iriyanto read the actions for fixing this failure, and rebooted the aircraft's two Flight Augmentation Computers (FACs). The same fault recurred at 06:09, and the captain fixed it in the same way. At 06:11, the pilots turned fifteen degrees to the left to avoid inclement weather, and contacted Jakarta ATC to request a climb to FL 380 at 12,000 metres (38,000 ft) for the same reason. The controller could not give immediate permission for this due to other aircraft in the vicinity, and instructed them to wait. While the pilots were waiting for permission to climb, the rudder limiter problem occurred for a third time, and for the third time the captain reset the FAC computers. When the memo displayed for the fourth time, Captain Iriyanto decided to reset the FAC circuit breakers (CB). He had previously seen this action being performed by a ground engineer, and believed that it was acceptable to do so in flight. The FAC circuit breakers were reset at 06:16:45, with immediate consequences, as this action not only reset the FAC computers but also disconnected the autopilot and autothrottle, and the flight control law changed from Normal to Alternate. It allowed the aircraft to roll to the left, and by the time First Officer Plesel reacted to this it was banked at 54 degrees. Plesel, possibly spatially disoriented due to the roll sensation, over-corrected twice: first by making a sharp right bank input and then a sharp left bank input. After that, at 06:17, Plesel made a nose-up input on his side-stick, causing the aircraft to enter a steep climb at a 24-degree nose-up pitch. The captain gave a confusing direction to "pull down", which "bears an internal contradiction as 'pull' suggests up, while 'down' means down." In just 54 seconds, the aircraft climbed from 32,000 feet to 38,500 ft (11,700 m), exceeding a climb rate of 10,000 ft/min (50 m/s). It then entered a stall, at around 06:17:40, descending at a rate of up to 20,000 ft/min (100 m/s). The aircraft also began a turn to the left, forming at least one complete circle before disappearing from radar at 06:18:44. At 06:20:35, the flight data recorder stopped recording. The CVR stopped recording one second later, at 06:20:36. The aircraft crashed into the Java Sea and was destroyed. All 162 people on board were killed instantly upon impact. Its last recorded position was over the Java Sea, Karimata Strait between the islands of Belitung and Kalimantan (3.3708°S 109.6911°E / -3.3708; 109.6911 (AirAsia Flight 8501 last transponder signal)). The aircraft crashed in the Java Sea, Karimata Strait between the islands of Belitung and Borneo (3.623°S 109.712°E / -3.623; 109.712 (AirAsia Flight 8501 crash site)). The cockpit voice recorder captured multiple warnings, including a stall warning, sounding in the cockpit during the final minutes of the flight. No distress signal was sent from the aircraft. Search and rescue (SAR) operations were activated by the Indonesia National Search and Rescue Agency (Basarnas) from the Pangkal Pinang office.

Aircraft The aircraft was an Airbus A320-216, with serial number 3648, registered as PK-AXC. It first flew on 25 September 2008, and was delivered to AirAsia on 15 October 2008. The aircraft was six years old and had accumulated approximately 23,039 airframe hours and around 13,610 takeoff and landing cycles. It had undergone its most recent scheduled maintenance on 16 November 2014. The aircraft was powered by two CFM International CFM56-5B6/3 engines and was configured to carry 180 passengers.

Victims

AirAsia released details of the 155 passengers, which included 137 adults, 17 children, and one infant. The crew consisted of two pilots, four flight attendants and an engineer. The passengers on board were mostly Indonesian with 3 passengers from South Korea and one each from Malaysia, Singapore, and the United Kingdom. The pilots on board the flight were:

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Indonesia AirAsia Flight 8501

Start with the simplest possible case. Write down what Indonesia AirAsia Flight 8501 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Indonesia AirAsia Flight 8501 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Indonesia AirAsia Flight 8501 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Indonesia AirAsia Flight 8501

In research: Indonesia AirAsia Flight 8501 appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Indonesia AirAsia Flight 8501 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Indonesia AirAsia Flight 8501 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2014 disasters in Indonesia, 2014 in Singapore, AirAsia, so understanding it makes those chapters shorter.
In everyday life: Look for Indonesia AirAsia Flight 8501 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Indonesia AirAsia Flight 8501 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Indonesia AirAsia Flight 8501 means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Indonesia AirAsia Flight 8501 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Indonesia AirAsia Flight 8501 in simple terms?

Why does Indonesia AirAsia Flight 8501 matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Indonesia AirAsia Flight 8501?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Indonesia AirAsia Flight 8501.