The name of the rainbow body achiever was Khenpo AChos . He was
born in Xinlong in May 1918. He learned characters at the age of 7
and became a monk at the age of 10. At the age of 14, he practiced
Buddha dharma in the Buddhism Study College at the local temple. At
the age of 22, he studied at Sera Monastery which was one of the
three major temples of Gelukpa sect in Lhasa. He had memorized a
variety of sutras in 48 different dialects. He was proficient in
exoteric and esoteric Buddhism and was very wise and strictly
obedient to the precepts.During the chinese cultural revolution, he
suffered from very cruel and inhumane torture. Even in those days
of total darkness, he did not complain to anyone. He remained
consistently faithful to his Master and the Three Jewels and
diligently practiced the Buddhadharma.
Around 1992, the Master many times entered into a kind of unique
state of phenomena for a long term. Had he entered Samadhi or was
he in a state of unconsciousness? The attendants were all confused
and did not know the status of this phenomenon. Two persons,
Luosang Ningzha and Lama Norta , headed toward H.H. Khenpo Achuk
Rinpoche’s place to request advice. Achuk Rinpoche said,
"That was a kind of realization state of entering the Great
Perfection where all the attachments have disappeared in the dharma
realm.
Several mysterious phenomena occurred around the Master's
meditation cabin in late August of 1998.Coming out of nowhere, a
snow white bird flew by. It was neither noisy nor agitated like any
other birds or sparrows but appeared to be quiet, peaceful, and
fearless to humans. It remained close enough to reach out and touch
and stayed with them for seven days.For a long period of time, a
beautiful melody was heard, like the sounds sung lightly by a
female, which was sweet in harmony. Yet, strangely, listening from
the yard, the sounds seemed to be coming out from the Master's
cabin; when people went into the cabin it seemed that the sounds
surrounded the top of the roof
After certain signs occurred, the disciples knew that their
Master was going to leave this world. On August 28th, they prayed
compassionately to the Master to receive his teachings forever and
inquired about the matter of his reincarnation. The Master
expounded happily with answers. In the meantime, he bestowed
important teachings to them.At 2 o'clock in the afternoon of August
29th, without illness, the Master twirled a mala and while lying in
an auspicious sleep position and chanting the Six-Syllable mantra,
passed peacefully. He passed away naturally, freely and was
comfortable.
At 7 o'clock the same evening, the disciples, following the
ritual of Tibetan rules for great virtuous beings, took off the
Master's clothes in preparation to cover him with Dharma clothes.
Right at this moment, a miracle happened. From head to toe, all the
old aged and wrinkled skin disappeared from the khenpo’s entire
body. The Master's skin changed into the condition of a seven or
eight year old child. Fresh and tender, the body was not old and
clumsy like his 80 old body before he passed away.
In the morning of August 30th, Lama Norta made butterlamp
offerings in the Master's meditation room and found that the body
underneath the Dharma clothes shrank a lot and had become smaller.
Since then, day by day, the body shrank more and more. The
disciples did not know what to do.
On September 1st, they rushed over to consult H.H. Khenpo Achuk
Rinpoche at Yachen Gar in Baiyu County. H.H. Khenpo Achuck
Rinpoche said, "It is better to keep this matter secret, so
by all means, do not advance these findings to anyone. People who
have violated any of the Fundamental Precepts of Esoteric Buddhism
are restricted from touching Khenpo Achos’s body. Do not move the
body within seven days. Wait until the eighth day to make any
arrangements."
On the morning of the eighth day, a total of six people went
into the cabin. They opened the Dharma clothes on the bed. Suddenly
everyone was astounded. Nothing remained on the bed. There wasn't
even a hair on the bed at all and the entire flesh and bones of the
body had not gone to the sky or to the ground. It had completely
transformed into rainbows. It had completely transformed into
rainbows as witnessed by many people.
Many people saw these phenomena. At first, they thought it was
the auspicious sign appearing for the coming back of the Jingmei
Huo Fo who lived in India. They did not expect it to be the passing
away of the Master. Many people including Gongboji saw that two
sides of the Master's meditation room emitted several rainbow
lights, and the top of the light beams entered into a dim sky.
Where the Master lived, many people had seen the colorful rainbows
appear in the sky for several consecutive days. These rainbows,
occurring from time to time, filled the sky.
After Khenpo Achos transformed into rainbow light, they
sent the true account of this rainbow body achievement to the
eminent monastics and practitioners in India and Tibet. They
particularly reported these or phenomena to Dharma King Jigme
Phuntsok
http://www.zhaxizhuoma.net/SEVEN_JEWELS/HOLY%20EVENTS/RAINBOW%20BODY/A-chos.html